Tootfinder

I'm happy to announce I will be speaking at #RustFestZurich this year. My talk is about Linon, a graphical #RustLang application I began writing during my MSc studies at @…

Interactive Exploration of Nonlinear Ray Casting with Rust and wgpu
Speaker: Niklas Korz Description Light is commonly assumed to travel linearly from source to destination. There are however cases where the path of light can be bent or distorted. In the case of black holes for example, the light is attracted by a very strong gravitational center. Heated air can change the direction of light through the varying refraction caused by the temperature transition from heat source to environment. Creating an interactive environment for exploration of such phenomena m…

More than 13 thousand children became orphans More than 13,000 children have been granted the status of an orphan or a child deprived of parental care since the start of the large-scale invasion,’ sai Source : https://uacrisis.org/en/ponad-13-tysyach-ditej-staly-syrotamy…

So I was rereading @…'s piece on neural network-created knitting patterns and wondered if ChatGPT could create cross stitch patterns for me. Sort of? Maybe?
(Bing CoPilot could not produce anything usable.)

SkyKnit: When knitters teamed up with a neural network
[Make Caows and Shapcho - MeganAnn] [Pitsilised Koekirjad Cushion Sampler Poncho - Maeve] [Lacy 2047 - michaela112358] I use algorithms called neural networks to write humor. What’s fun about neural networks is they learn by example - give them a bunch of some sort of data, and they’ll try to figure out rules that let them imitate it. They power corporate finances, recognize faces, translate text, and more. I, however, like to give them silly datasets. I’ve trained neural networks to gene…

You are attending #DHd2024 and interested in Art History, particularly in Renaissance and Vasari's Life of the Artists? With my colleague @… we are creating a #knowledgegraph

Just submitted my talk abstract for @… and I can't wait to tell you all about this project, it has easily 500% more guest appearances by grizzled desert prospectors than anything I've done before
which is really saying something given I work in the Mojave
(Scan from the LA Times archive, dated 15 June 1924)

The transformation of local TV news into scaremongering copaganda is so disappointing.
For example, check out the website of the #Memphis #CBS affiliate, WREG. There are 25 headlines visible. 22 of them are crime stories, mostly regurgitated from police narratives. (Several are the same stories li…

How Much of the Bible Was Written by Enslaved People?
https://www.thedailybeast.com/how-much-of-the-bible-was-written-by-enslaved-people

How Much of the Bible Was Written by Enslaved People?
We know Paul himself did not actually draft his letters to far-flung Christians, for example, but it’s still unclear how much credit he shares with his enslaved secretaries.

Q - do you know of well-researched articles, or academic papers, that explore the risks to the Internet’s infrastructure due to climate change?
I.e. how do we keep the Internet functioning in the midst of extreme weather and other aspects of climate change? For example, if sea levels rise, what will that do to subsea cable landing stations?
I am building a list of articles and papers, and I have some.. but am looking for more.
Thanks!

#Obsidian Sync, lots of message notifications, almost every 5 seconds, how can I fix it?
https://forum.obsidian.md/t/obsidian-sync-lots-…

Woohoo! My old ppscsi scanner scans:
# scanimage -d hp:/dev/sg3 -v -p --mode color -o /tmp/g.jpg
scanimage: scanning image of size 2550x3507 pixels at 24 bits/pixel
scanimage: acquiring RGB frame
scanimage: min/max graylevel value = 11/255
scanimage: read 26828550 bytes in total
# uname -a
Linux ood 6.5.0-28-generic #29~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Thu Apr 4 14:39:20 UTC 2 x86_64 x86_64 x86_64 GNU/Linux
And the scan, a 1946 radio amateur intr…

I've successfully gone from "write a quick python script to do something" to "I have a complex python application with a config file that gives me a lot of flexibility in using it and actually saves me a ton of time", and am currently considering escalating to "I need a domain-specific language (DSL) for the config to support even more complex use cases".
However, my intuition says that, as a rule of thumb, when you reach the point where you consider introducing a DSL, you should maybe instead reconsider some other parts of the system first. For example, I may just make it easier to introduce your own Python code to perform these complex custom checks, instead of generating it based on a config file 😅​.

So I was rereading @…'s piece on neural network-created knitting patterns and wondered if ChatGPT could create cross stitch patterns for me. Sort of? Maybe?
(Bing CoPilot could not produce anything usable.)

SkyKnit: When knitters teamed up with a neural network
[Make Caows and Shapcho - MeganAnn] [Pitsilised Koekirjad Cushion Sampler Poncho - Maeve] [Lacy 2047 - michaela112358] I use algorithms called neural networks to write humor. What’s fun about neural networks is they learn by example - give them a bunch of some sort of data, and they’ll try to figure out rules that let them imitate it. They power corporate finances, recognize faces, translate text, and more. I, however, like to give them silly datasets. I’ve trained neural networks to gene…

The first rule of #distributedsystems is "Don’t distribute your system". Designing distributed systems right is infamously hard for multiple reasons.
Imagine that the client sending a request sends a unique key along. The server keeps track of key-request pairs.
It’s precisely the idea behind the

Las Vegas Raiders defensive tackle John Jenkins gives the best example of the culture shift last season https://www.yardbarker.com/nfl/articles/las_vegas_raiders_defensive_t…

Las Vegas Raiders defensive tackle John Jenkins gives the best example of the culture shift last season
This time last season, everyone was arguing whether or not the Las Vegas Raiders should fire head coach Josh McDaniels after just one full season. Little did we know that nine weeks into the 2023 season, he would be replaced by the linebackers coach, Antonio Pierce, who is set to bring Raider football back. Was that the right hire for the future when they hired him this offseason and removed the interim tag? Well, that is still to be determined. Was it the right decision to make him the interim…

This thread is an example of posts may be federated but can subtly clash across platforms that confuses intent, tone and replies, in this case because of the dumb naming formats allowed that makes casing significant 'sometimes'.
https://mastodon.online/@MisterMoo/112…

Amazon, SpaceX, Starbucks and Trader Joe’s have all responded to allegations that they have violated labor laws with the same bold argument. The National Labor Relations Board, they assert in several ongoing legal proceedings, is unconstitutional.
SpaceX, for example, says that the NLRB is engaging in “an unlawful attempt … to subject Space X to an administrative proceeding whose structure violates Article II, the Fifth Amendment, and the Seventh Amendment of the Constitution of the Uni…

Amazon, SpaceX And Others Are Arguing That The NLRB Is Actually Unconstitutional
This article is part of TPM Cafe, TPM’s home for opinion and news analysis. It was originally published at The Conversation. Amazon, SpaceX, Starbucks and Trader Joe’s have all responded to…

Conservation Laws For Every Quantum Measurement Outcome
Daniel Collins, Sandu Popescu
https://arxiv.org/abs/2404.18621 https://arxiv.…

Conservation Laws For Every Quantum Measurement Outcome
In the paradigmatic example of quantum measurements, whenever one measures a system which starts in a superposition of two states of a conserved quantity, it jumps to one of the two states, implying different final values for the quantity that should have been conserved. The standard law of conservation for quantum mechanics handles this jump by stating only that the total distribution of the conserved quantity over repeated measurements is unchanged, but states nothing about individual cases. …

You are attending #DHd2024 and interested in Art History, particularly in Renaissance and Vasari's Life of the Artists? With my colleague @… we are creating a #knowledgegraph

High Expectations: An Observational Study of Programming and Cannabis Intoxication
Wenxin He, Manasvi Parikh, Westley Weimer, Madeline Endres
https://arxiv.org/abs/2402.19194

High Expectations: An Observational Study of Programming and Cannabis Intoxication
Anecdotal evidence of cannabis use by professional programmers abounds. Recent studies have found that some professionals regularly use cannabis while programming even for work-related tasks. However, accounts of the impacts of cannabis on programming vary widely and are often contradictory. For example, some programmers claim that it impairs their ability to generate correct solutions while others claim it enhances creativity and focus. There remains a need for an empirical understanding of th…

This https://arxiv.org/abs/2110.05534 has been replaced.
link: https://scholar.google.com/scholar?q=a

Essential dimension via prismatic cohomology
For $X$ a smooth, proper complex variety we show that for $p\gg 0$, the restriction of the mod $p$ cohomology $H^i(X,\mathbb{F}_p)$ to any Zariski open has dimension at least $h^{0,i}_X$. The proof uses the prismatic cohomology of Bhatt-Scholze. We use this result to obtain lower bounds on the $p$-essential dimension of covers of complex varieties. For example, we prove the $p$-incompressibility of the mod $p$ homology cover of an abelian variety, confirming a conjecture of Brosnan for suffic…

#PersonalAI isn't as straightforward as people sometimes make it out to be.
Example: today's Meta-AI-inside-Messenger experiment. Prompt: A campfire while backpacking in the Sierra at dusk, with me roasting marshmallows.
The scenery is very nice, and looks like the Sierras, even the right type of trees. So that's great. Given Meta has social media photos of me, so one woul…

@… I am looking forward to hear someone respond positively to your call, because I'm overly sceptical about the reliability of such assessments made by language models.
Of course it depends on what kind of "matches" you're after. For example at this stage, I tend to think different approaches are necessary for explicit vs implicit references. F…

Hakochitsu box making workshop with Midori Kunikata-Cockram
#SocietyOfBookbinders
#Bookbinding
#ContinualProfessionalDevelopment

In tonight's sitting I was reminded how, for me these days, #meditation is matter-of-factly less about gaining a special state or a deeper relaxation, and more about participating appreciatively in what's present. The terms for that can sound exotic, like "suchness practice," but the practical experience brings a renewed regard for, as an example, Dōgen's instruction:

Disentangling representations of retinal images with generative models
Sarah M\"uller, Lisa M. Koch, Hendrik P. A. Lensch, Philipp Berens
https://arxiv.org/abs/2402.19186

Disentangling representations of retinal images with generative models
Retinal fundus images play a crucial role in the early detection of eye diseases and, using deep learning approaches, recent studies have even demonstrated their potential for detecting cardiovascular risk factors and neurological disorders. However, the impact of technical factors on these images can pose challenges for reliable AI applications in ophthalmology. For example, large fundus cohorts are often confounded by factors like camera type, image quality or illumination level, bearing the …

We've gotten into lots of small discussions on that thread so I'm breaking some of them off so that those who don't want to be included anymore, can dip out of the discussion.
-------
Basically, this is the downside of managed hosting, unfortunately. There ARE ways that the managed host could give you cheap options to extend your use, but they won't do that because it'll cut into their profits.🤷‍♂️
For example, the managed host could make a simple script that only deletes stuff that hasn't been interacted with, along with deleting the cached versions of profile pics and headers. Also it's relatively simple to setup S2 storage which is HELLA cheap.
I pay about $30 a month for my instance, but it requires Linux knowledge, at least the very basics and I control how much storage I wanna keep. I've had up to 1 tb and it costed me $7 a month.
From: @…
https://boles.xyz/@david/112349386906617626

OK, we've got a new example for the dictionary definition of "nepotism"
https://mastodon.online/@SocraticEthics/112361051992864819

This https://arxiv.org/abs/2401.01860 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Reciprocity obstructions in semigroup orbits in SL(2, Z)
We study orbits of semigroups of $\text{SL}(2,\mathbb{Z})$, and demonstrate reciprocity obstructions: we show that certain such orbits avoid squares, but not as a consequence of obstructions inherited from an algebraic set, and not as a consequence of congruence obstructions. This is in analogy to the reciprocity obstructions recently used to disprove the Apollonian local-global conjecture. We give an example of such an orbit which is known exactly, and misses all squares together with an expli…

I had a lot of fun (and frustration) developing a pure-CSS contraption that takes plain book cover images and assembles a small gallery. 😁
1) It adds a "bevel gradient" to give the effect of a book cover.
2) It sets the background gradient.
3) And it pseudorandomly tilts the books.
#css #webdev

A Harris theorem for enhanced dissipation, and an example of Pierrehumbert
William Cooperman, Gautam Iyer, Seungjae Son
https://arxiv.org/abs/2403.19858 ht…

A Harris theorem for enhanced dissipation, and an example of Pierrehumbert
In many situations, the combined effect of advection and diffusion greatly increases the rate of convergence to equilibrium -- a phenomenon known as enhanced dissipation. Here we study the situation where the advecting velocity field generates a random dynamical system satisfying certain Harris conditions. If $κ$ denotes the strength of the diffusion, then we show that with probability at least $1 - o(κ^N)$ enhanced dissipation occurs on time scales of order $|\ln κ|$, a bound whic…

Dynamical typicality in elementary cellular automata
Nicolas Nessi
https://arxiv.org/abs/2403.19832 https://arxiv.org/pdf/2403.19832<…

Dynamical typicality in elementary cellular automata
We study the dynamics of elementary cellular automata (CA) using numerical simulations. We follow the dynamics of macroscopic observables, which depend on the state of a large number of sites. If we consider the ensemble of states that share the same value of some macroscopic observable, for example, the density, we find that the dynamics of such macroscopic observable is approximately the same for the vast majority of the states in the ensemble, irrespective of the microscopic details, provide…

Quarantining Malicious IoT Devices in Intelligent Sliced Mobile Networks
David Candal-Ventureira, Pablo Fondo-Ferreiro, Felipe Gil-Casti\~neira, Francisco Javier Gonz\'alez-Casta\~no
https://arxiv.org/abs/2403.19731

Quarantining Malicious IoT Devices in Intelligent Sliced Mobile Networks
The unstoppable adoption of the Internet of Things (IoT) is driven by the deployment of new services that require continuous capture of information from huge populations of sensors, or actuating over a myriad of "smart" objects. Accordingly, next generation networks are being designed to support such massive numbers of devices and connections. For example, the 3rd Generation Partnership Project (3GPP) is designing the different 5G releases specifically with IoT in mind. Nevertheless, from a sec…

Finite skew braces of square-free order and supersolubility
Adolfo Ballester-Bolinches, Ram\'on Esteban-Romero, Maria Ferrara, Vicent P\'erez-Calabuig, Marco Trombetti
https://arxiv.org/abs/2402.18486

Finite skew braces of square-free order and supersolubility
The aim of this paper is to study supersoluble skew braces, a class of skew braces that encompasses all finite skew braces of square-free order. It turns out that finite supersoluble skew braces have Sylow towers, and that in an arbitrary supersoluble skew brace $B$ many relevant skew brace-theoretical properties are easier to identify: for example, a centrally nilpotent ideal of $B$ is $B$-centrally nilpotent, a fact that simplifies the computational search for the Fitting ideal; also, $B$ has…

We've written guidelines for news reporting that supports democracy. This column from Cleveland.com is a great example of what we think we need.
Our Trump reporting upsets some readers, but there aren’t two sides to facts: Letter from the Editor

Our Trump reporting upsets some readers, but there aren’t two sides to facts: Letter from the Editor
This is a tough column to write, because I don’t want to demean or insult those who write me in good faith. I’ve started it a half dozen times since November but turned to other topics each time because this needle hard to thread.

Spectral Extraction of Unique Latent Variables
Shira Yoffe, Amit Moscovich, Ariel Jaffe
https://arxiv.org/abs/2402.18741 https://arxi…

Spectral Extraction of Unique Latent Variables
Multimodal datasets contain observations generated by multiple types of sensors. Most works to date focus on uncovering latent structures in the data that appear in all modalities. However, important aspects of the data may appear in only one modality due to the differences between the sensors. Uncovering modality-specific attributes may provide insights into the sources of the variability of the data. For example, certain clusters may appear in the analysis of genetics but not in epigenetic ma…

This https://arxiv.org/abs/2404.05677 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_grqc_…

Pulsar Timing Array Harmonic Analysis and Source Angular Correlations
Gravitational waves (GWs) influence the arrival times of radio signals coming from pulsars. Here, we investigate the harmonic space approach to describing a pulsar's response to GWs. We derive and discuss the "diagonalized form" of the response, which is a sum of spin-2-weighted spherical harmonics of the GW direction multiplied by normal (spin-weight 0) spherical harmonics of the pulsar direction. We show how this allows many useful objects, for example, the Hellings and Downs two-point functi…

Woohoo! My old ppscsi scanner scans:
# scanimage -d hp:/dev/sg3 -v -p --mode color -o /tmp/g.jpg
scanimage: scanning image of size 2550x3507 pixels at 24 bits/pixel
scanimage: acquiring RGB frame
scanimage: min/max graylevel value = 11/255
scanimage: read 26828550 bytes in total
# uname -a
Linux ood 6.5.0-28-generic #29~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Thu Apr 4 14:39:20 UTC 2 x86_64 x86_64 x86_64 GNU/Linux
And the scan, a 1946 radio amateur intr…

I've successfully gone from "write a quick python script to do something" to "I have a complex python application with a config file that gives me a lot of flexibility in using it and actually saves me a ton of time", and am currently considering escalating to "I need a domain-specific language (DSL) for the config to support even more complex use cases".
However, my intuition says that, as a rule of thumb, when you reach the point where you consider introducing a DSL, you should maybe instead reconsider some other parts of the system first. For example, I may just make it easier to introduce your own Python code to perform these complex custom checks, instead of generating it based on a config file 😅​.

This https://arxiv.org/abs/2310.02875 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csRO_…

Approximating Robot Configuration Spaces with few Convex Sets using Clique Covers of Visibility Graphs
Many computations in robotics can be dramatically accelerated if the robot configuration space is described as a collection of simple sets. For example, recently developed motion planners rely on a convex decomposition of the free space to design collision-free trajectories using fast convex optimization. In this work, we present an efficient method for approximately covering complex configuration spaces with a small number of polytopes. The approach constructs a visibility graph using sampling…

Representing Knowledge and Querying Data using Double-Functorial Semantics
Michael Lambert, Evan Patterson
https://arxiv.org/abs/2403.19884 https://…

Representing Knowledge and Querying Data using Double-Functorial Semantics
Category theory offers a mathematical foundation for knowledge representation and database systems. Popular existing approaches model a database instance as a functor into the category of sets and functions, or as a 2-functor into the 2-category of sets, relations, and implications. The functional and relational models are unified by double functors into the double category of sets, functions, relations, and implications. In an accessible, example-driven style, we show that the abstract structu…

"Cyclist (60s) killed in Kildare collision" "The man aged in his 60s was involved in a collision with a car at around 11.20am on Sunday"
#Ireland can't even bring itself to admit when drivers kill cyclists. Here's todays bloody ridiculous example from BreakingNews.

Primordial black holes or else? Tidal tests on subsolar mass gravitational-wave observations
F. Crescimbeni, G. Franciolini, P. Pani, A. Riotto
https://arxiv.org/abs/2402.18656

Primordial black holes or else? Tidal tests on subsolar mass gravitational-wave observations
The detection of a subsolar object in a compact binary merger is regarded as one of the smoking gun signatures of a population of primordial black holes (PBHs). We critically assess whether these systems could be distinguished from stellar binaries, for example composed of white dwarfs or neutron stars, which could also populate the subsolar mass range. At variance with PBHs, the gravitational-wave signal from stellar binaries is affected by tidal effects, which dramatically grow for moderately…

Come on. This push to summarize all webpages and written content with #AI is ridiculous.
See this example from #Arc Search - in what world is this an adequate summary for an 8,000 word article that takes 43 minutes to read?
The amount of detail, specificity, narrative, and actual arguments that get lo…

This https://arxiv.org/abs/2404.13137 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Evolutive sandpiles
Sandpile group or Abelian sandpile model was the first example of a self-organized critical system studied by Bak, Tang and Wiesenfeld. The dynamics of the sandpiles occurs when the grains topple over a graph. In this study, we allow the graph evolve over time and change the topology at each stage. This results in the occurrence of phenomenons impossible in the classical sandpile models. Like, configurations over evolutive graphs that are always are unstable. We also experiment with the stabili…

Oberwolfach Workshop Report: Analysis, Geometry and Topology of Positive Scalar Curvature Metrcs: Limits of sequences of manifolds with nonnegative scalar curvature and other hypotheses
Christina Sormani wth Wenchuan Tian, Changliang Wang
https://arxiv.org/abs/2404.17121 https://arxiv.org/pdf/2404.17121
arXiv:2404.17121v1 Announce Type: new
Abstract: This report contains a survey of examples of sequences of manifolds with nonnegative scalar curvature including an extreme example with Wenchuan Tian and Changliang Wang. It announces a paper with Wenchaun Tian proving the GH and SWIF convergence of the extreme example. It contains six Open Questions concerning such sequences.

Still enjoying the When It Hits the Fan podcast but in this episode more than most it is making me shout at the playter to hear Yelland say "everyone has a right to privacy".
Former editor of The Sun, for fuck's sake! At a time when, for example, they posted topless photos of teh Countess of Wessex obtained without consent by long lens.
http…

This https://arxiv.org/abs/2303.16917 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Classification of chiral fermionic CFTs of central charge $\le 16$
We classify two-dimensional purely chiral conformal field theories which are defined on two-dimensional surfaces equipped with spin structure and have central charge less than or equal to 16, and discuss their duality webs. This result can be used to confirm that the list of non-supersymmetric ten-dimensional heterotic string theories found in the late 1980s is complete and does not miss any exotic example.

Be amazed/horrified by how many relevant #opensource projects are maintained by just one person.
Practical illustrated example:
https://npmgraph.js.org/?q…

Stunning police brutality will ignite a student anti-war movement in America
There's a chilling pattern between state violence and movement participation.
For example, Indigenous activists have organized for environmental issues for decades,
but the general public only became aware of what was going down in Standing Rock after Democracy Now shared footage of protesters being attacked by officers with guard dogs and pepper spray.
That catalyzed several hundred so…

Dallas Cowboys Named A Top Fit For Free Agent Star Safety https://www.yardbarker.com/nfl/articles/dallas_cowboys_named_a_top_fit_for_free_agent_star_safety/s1_17150_40171794

Dallas Cowboys Named A Top Fit For Free Agent Star Safety
The Dallas Cowboys have a pair of terrific cornerbacks in Trevon Diggs and DaRon Bland, but their safety group could use some work. Due to financial constraints, the Cowboys were unable to pursue any of the top safeties on the market in free agency, but there are still a couple of guys out there who could represent viable options. Nick Pedone of Pro Football Network cites Jamal Adams as an example. There was a time when Adams was one of the best defensive backs in football, but those days are l…

This https://arxiv.org/abs/2310.16215 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Rotational magic conditions for ultracold molecules in the presence of Raman and Rayleigh scattering
Molecules have vibrational, rotational, spin-orbit and hyperfine degrees of freedom or quantum states, each of which responds in a unique fashion to external electromagnetic radiation. The control over superpositions of these quantum states is key to coherent manipulation of molecules. For example, the better the coherence time the longer quantum simulations can last. The important quantity for controlling an ultracold molecule with laser light is its complex-valued molecular dynamic polarizabi…

Okay, so another Curb-Cut Effect of using #AltText for sighted peeps: #mastodon (at least when your instance enables full-text) search also searches the alt text of posts.
So for example, maybe you want to find that toot you made involving a bowl; so you (if you're me) enter &quot…

I'm polishing the front end of a petproject and Im researching front-end design ideology. Right now it just spits out html with class attributes that tie in with a very rudimentary stylesheet.
The goal is allow user css customization of every element but also ensure its not *too* flexible as to break accessibility. So for example, striking a balance between html tables or just dumping everyting as divs and spans and let the grids/flexboxes sort it out.

There’s actually two fundamentally different types of tech hype:
1. Works
2. Doesn’t work
Both normally have in common that they turn out to not be very useful while having serious, dealbraking drawbacks.
For example:
- VR/AR is 1. (isolating and uncomfortable, makes people sick, lack of “killer app”)
- LLM’s are 2. (lying, produce mediocre output, definitely not intelligent, unsustainably expensive to run)

Using text embedding models and vector databases as text classifiers with the example of medical data
Rishabh Goel
https://arxiv.org/abs/2402.16886 https:/…

Using text embedding models and vector databases as text classifiers with the example of medical data
The advent of Large Language Models (LLMs) is promising and has found application in numerous fields, but as it often is with the medical field, the bar is typically quite high [5]. In tandem with LLMs, vector embedding models and vector databases provide a robust way of expressing numerous modes of data that are easily digestible by typical machine learning models. Along with the ease of adding information, knowledge, and data to these vector databases, they provide a compelling reason to appl…

This https://arxiv.org/abs/2106.11392 has been replaced.
link: https://scholar.google.com/scholar?q=a

Noncommutative geometry of elliptic surfaces
We recast elliptic surfaces over the projective line in terms of the non-commutative tori and one-parameter families of the periodic continued fractions. The correspondence is used to study the Picard numbers, the ranks and the minimal models of such surfaces. As an example, we calculate the Picard numbers of elliptic surfaces with fibers having complex multiplication.

A Simple Example of Pathological Foliations in Skew-Product Diffeomorphisms
Zhihong Xia, Peizheng Yu
https://arxiv.org/abs/2404.18495 https://

A Simple Example of Pathological Foliations in Skew-Product Diffeomorphisms
Inspired by examples of Katok and Milnor \cite{Milnor1997}, we construct a simple example of skew-product volume preserving diffeomorphism where the center foliation is pathological in the sense that, there is a full measure set whose intersection with any center leaf contains at most one point.

This https://arxiv.org/abs/2204.07839 has been replaced.
link: https://scholar.google.com/scholar?q=a

Dependence Logics in Temporal Settings
Many forms of dependence manifest themselves over time, with behavior of variables in dynamical systems as a paradigmatic example. This paper studies temporal dependence in dynamical systems from a logical perspective, by enriching a minimal modal base logic of static functional dependencies. We first introduce a logic for dynamical systems featuring temporalized variables, provide a complete axiomatic proof calculus, and show that its satisfiability problem is decidable. Then, to capture expli…

Decompositions of hyperbolic Kac-Moody algebras with respect to imaginary root groups
Alex J. Feingold, Axel Kleinschmidt, Hermann Nicolai
https://arxiv.org/abs/2402.17737

Decompositions of hyperbolic Kac-Moody algebras with respect to imaginary root groups
We propose a novel way to define imaginary root subgroups associated with (timelike) imaginary roots of hyperbolic Kac-Moody algebras. Using in an essential way the theory of unitary irreducible representation of covers of the group SO(2,1), these imaginary root subgroups act on the complex Kac-Moody algebra viewed as a Hilbert space. We illustrate our new view on Kac-Moody groups by considering the example of a rank-two hyperbolic algebra that is related to the Fibonacci numbers. We also point…

MegaPrompt: The Orwell Test: https://tceajmg.micro.blog/2024/03/27/megaprompt-the-orwell.html

My current take on the #xz situation, not having read the actual source backdoor commits yet (thanks a lot #Github for hiding the evidence at this point...) besides reading what others have written about it (cf. #rustlang for such central library dependencies would maybe (really big maybe) have made it a bit harder to push a backdoor like this because - if and only if the safety features are used idiomatically in an open source project - reasonably looking code is (a bit?) more limited in the sneaky behavior it could include. We should still very much use those languages over C/C for infrastructure code because the much larger class of unintentional bugs is significantly mitigated, but I believe (without data to back it up) that even such "bugdoor" type changes will be harder to execute. However, given the sophistication in this case, it may not have helped at all. The attacker(s) have shown to be clever enough.
6. Sandboxing library code may have helped - as the attacker(s) explicitly disabled e.g. landlock, that might already have had some impact. We should create better tooling to make it much easier to link to infrastructure libraries in a sandboxed way (although that will have performance implications in many cases).
7. Automatic reproducible builds verification would have mitigated this particular vector of backdoor distribution, and the Debian team seems to be using the reproducibility advances of the last decade to verify/rebuild the build servers. We should build library and infrastructure code in a fully reproducible manner *and* automatically verify it, e.g. with added transparency logs for both source and binary artefacts. In general, it does however not prevent this kind of supply chain attack that directly targets source code at the "leaf" projects in Git commits.
8. Verifying the real-life identity of contributors to open source projects is hard and a difficult trade-off. Something similar to the #Debian #OpenPGP #web-of-trust would potentially have mitigated this style of attack somewhat, but with a different trade-off. We might have to think much harder about trust in individual accounts, and for some projects requiring a link to a real-world country-issued ID document may be the right balance (for others it wouldn't work). That is neither an easy nor a quick path, though. Also note that sophisticated nation state attackers will probably not have a problem procuring "good" fake IDs. It might still raise the bar, though.
9. What happened here seems clearly criminal - at least under my IANAL naive understanding of EU criminal law. There was clear intent to cause harm, and that makes the specific method less important. The legal system should also be able to help in mitigating supply chain attacks; not in preventing them, but in making them more costly if attackers can be tracked down (this is difficult in itself, see point 8) and face risk of punishment after the fact.
H/T @… @… @… @… @…

Innovative Jewish community leader Yocheved Sidof (#Purim

This https://arxiv.org/abs/2210.04219 has been replaced.
link: https://scholar.google.com/scholar?q=a

Rational cross-sections, bounded generation and orders on groups
We provide new examples of groups without rational cross-sections (also called regular normal forms), using connections with bounded generation and rational orders on groups. Specifically, our examples are extensions of infinite torsion groups, groups of Grigorchuk type, wreath products similar to $C_2\wr(C_2\wr \mathbb Z)$ and $\mathbb Z\wr F_2$, a group of permutations of $\mathbb Z$, and a finitely presented HNN extension of the first Grigorchuk group. This last group is the first example of…

This https://arxiv.org/abs/2305.07371 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

On Pre-Novikov Algebras and Derived Zinbiel Variety
For a non-associative algebra $A$ with a derivation $d$, its derived algebra $A^{(d)}$ is the same space equipped with new operations $a\succ b = d(a)b$, $a\prec b = ad(b)$, $a,b\in A$. Given a variety ${\rm Var}$ of algebras, its derived variety is generated by all derived algebras $A^{(d)}$ for all $A$ in ${\rm Var}$ and for all derivations $d$ of $A$. The same terminology is applied to binary operads governing varieties of non-associative algebras. For example, the operad of Novikov algebras…

@… can you link to an example of mainstream philosophical criticism of technology?
Thanks

Computation of the expectation value of the spin operator $\hat{S}^2$ for the Spin-Flip Bethe-Salpeter Equation
Bradford A. Barker, Arabi Seshappan, David A. Strubbe
https://arxiv.org/abs/2402.17719

Computation of the expectation value of the spin operator $\hat{S}^2$ for the Spin-Flip Bethe-Salpeter Equation
Spin-flip methods applied to excited-state approaches like the Bethe-Salpeter Equation allow access to the excitation energies of open-shell systems, such as molecules and defects in solids. The eigenstates of these solutions, however, are generally not eigenstates of the spin operator $\hat{S}^2$. Even for simple cases where the excitation vector is expected to be, for example, a triplet state, the value of $\langle \hat{S}^2 \rangle$ may be found to differ from 2.00; this difference is called…

This https://arxiv.org/abs/2309.02072 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_eco…

Data Scaling Effect of Deep Learning in Financial Time Series Forecasting
For many years, researchers have been exploring the use of deep learning in the forecasting of financial time series. However, they have continued to rely on the conventional econometric approach for model optimization, optimizing the deep learning models on individual assets. In this paper, we use the stock volatility forecast as an example to illustrate global training - optimizes the deep learning model across a wide range of stocks - is both necessary and beneficial for any academic or indu…

This https://arxiv.org/abs/2404.04739 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csSD_…

Mathematics of the MML functional quantizer modules for VCV Rack software synthesizer
We detail the mathematical formulation of the line of "functional quantizer" modules developed by the Mathematics and Music Lab (MML) at Michigan Technological University, for the VCV Rack software modular synthesizer platform, which allow synthesizer players to tune oscillators to new musical scales based on mathematical functions. For example, we describe the recently-released MML Logarithmic Quantizer (LOG QNT) module that tunes synthesizer oscillators to the non-Pythagorean musical scale in…

Representing Knowledge and Querying Data using Double-Functorial Semantics
Michael Lambert, Evan Patterson
https://arxiv.org/abs/2403.19884 https://…

Representing Knowledge and Querying Data using Double-Functorial Semantics
Category theory offers a mathematical foundation for knowledge representation and database systems. Popular existing approaches model a database instance as a functor into the category of sets and functions, or as a 2-functor into the 2-category of sets, relations, and implications. The functional and relational models are unified by double functors into the double category of sets, functions, relations, and implications. In an accessible, example-driven style, we show that the abstract structu…

C’s behaviour is bothering me. She’s doing this thing on many occasions, where she’ll respond to something I say with a passive aggressive put down. For example, I asked Google ‘what’s the weather today?’. She said ‘look out of the window, it’s raining’. I know that, I’m trying to know whether it will rain all day or not. This is just one of many comments. I’ve survived an abusive 20 year marriage and won’t put up with any more

This https://arxiv.org/abs/2402.03854 has been replaced.
link: https://scholar.google.com/scholar?q=a

On the calculation and use of effective single-particle energies. The example of the neutron $1d_{3/2}$-$1d_{5/2}$ splitting along $\text{N}=20$ isotones
The rich phenomenology of quantum many-body systems such as atomic nuclei is complex to interpret. Often, the behaviour (e.g. evolution with the number of constituents) of measurable/observable quantities such as binding or excitation energies can be best understood on the basis of a simplified picture involving auxiliary quantities that are not observable, i.e. whose values vary with parameters that are internal to the theoretical construction (contrarily to measurable/observable quantities). …

$L$-space knots with positive surgeries that are not weakly symplectically fillable
Isacco Nonino
https://arxiv.org/abs/2404.17308 https://

$L$-space knots with positive surgeries that are not weakly symplectically fillable
In this paper we discuss a general strategy to detect the absence of weakly symplectic fillings of $L$-spaces. We start from a generic $L$-space knot and consider (positive) Dehn surgeries on it. We compute, using arithmetic data depending only on the knot type and the surgery coefficient, the value of the relevant geometric invariants used to obstruct fillability. We also provide a new example of an infinite family of hyperbolic $L$-spaces that do not admit weakly symplectic fillings. These ar…

This https://arxiv.org/abs/2404.00566 has been replaced.
link: https://scholar.google.com/scholar?q=a

CodeBenchGen: Creating Scalable Execution-based Code Generation Benchmarks
To facilitate evaluation of code generation systems across diverse scenarios, we present CodeBenchGen, a framework to create scalable execution-based benchmarks that only requires light guidance from humans. Specifically, we leverage a large language model (LLM) to convert an arbitrary piece of code into an evaluation example, including test cases for execution-based evaluation. We illustrate the usefulness of our framework by creating a dataset, Exec-CSN, which includes 1,931 examples involvin…

Chemours and DuPont Knew About Risks But Kept Making Toxic PFAS Chemicals, UN Human Rights Advisors Conclude - Inside Climate News
https://insideclimatenews.org/news/26022024/un-chemours-pfas-north-carolina/

Chemours and DuPont Knew About Risks But Kept Making Toxic PFAS Chemicals, UN Human Rights Advisors Conclude - Inside Climate News
A UN human rights panel calls on the UN Environment Assembly to take on “forever chemicals” at a meeting in Nairobi, citing a North Carolina PFAS plant as an example of environmental negligence.

Extremal problems about the order and size of nonhamiltonian locally linear graphs
Feng Liu, Leilei Zhang
https://arxiv.org/abs/2402.16066 https://<…

Extremal problems about the order and size of nonhamiltonian locally linear graphs
The study of the relationship between local and global properties of mathematical objects has always been a key subject of investigation in different areas of mathematics. A graph $G$ is called locally linear if the neighbourhood of every vertex of $G$ induces a path. And $G$ is called locally hamiltonian (traceable) if the neighbourhood of every vertex of $G$ induces a hamiltonian (traceable) graph. The local properties of graphs are being studied extensively. For example, the minimum order of…

Counting points with Riemann-Roch formulas
Jorge Mart\'in-Morales
https://arxiv.org/abs/2402.18193 https://arxiv.org/pdf/2402.181…

Counting points with Riemann-Roch formulas
We provide an algorithm for computing the number of integral points lying in certain triangles that do not have integral vertices. We use techniques from Algebraic Geometry such as the Riemann-Roch formula for weighted projective planes and resolution of singularities. We analyze the complexity of the method and show that the worst case is given by the Fibonacci sequence. At the end of the manuscript a concrete example is developed in detail where the interplay with other invariants of singular…

Takens' Last Problem and strong pluripotency
Shin Kiriki, Xiaolong Li, Yushi Nakano, Teruhiko Soma, Edson Vargas
https://arxiv.org/abs/2404.17932 https…

Takens' Last Problem and strong pluripotency
We consider the concept of strong pluripotency of dynamical systems for a hyperbolic invariant set, as introduced in [KNS]. To the best of our knowledge, for the whole hyperbolic invariant set, the existence of robust strongly pluripotent dynamical systems has not been proven in previous studies. In fact, there is an example of strongly pluripotent dynamical systems in [CV01], but its robustness has not been proven. On the other hand, robust strongly pluripotent dynamical systems for some prope…

This https://arxiv.org/abs/2311.06909 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

A Quantum Mechanical Example for Hodge Theory
On the basis of (i) the discrete and continuous symmetries (and corresponding conserved charges), (ii) the ensuing algebraic structures of the symmetry operators and conserved charges, and (iii) a few basic concepts behind the subject of differential geometry, we show that the celebrated Friedberg-Lee-Pang-Ren (FLPR) quantum mechanical model (describing the motion of a single non-relativistic particle of unit mass under the influence of the general spatial 2D rotationally invariant potential) p…

This https://arxiv.org/abs/2211.16657 has been replaced.
link: https://scholar.google.com/scholar?q=a

Task-Driven Hybrid Model Reduction for Dexterous Manipulation
In contact-rich tasks, like dexterous manipulation, the hybrid nature of making and breaking contact creates challenges for model representation and control. For example, choosing and sequencing contact locations for in-hand manipulation, where there are thousands of potential hybrid modes, is not generally tractable. In this paper, we are inspired by the observation that far fewer modes are actually necessary to accomplish many tasks. Building on our prior work learning hybrid models, represen…

Out-of-distribution generalization under random, dense distributional shifts
Yujin Jeong, Dominik Rothenh\"ausler
https://arxiv.org/abs/2404.18370 htt…

Out-of-distribution generalization under random, dense distributional shifts
Many existing approaches for estimating parameters in settings with distributional shifts operate under an invariance assumption. For example, under covariate shift, it is assumed that p(y|x) remains invariant. We refer to such distribution shifts as sparse, since they may be substantial but affect only a part of the data generating system. In contrast, in various real-world settings, shifts might be dense. More specifically, these dense distributional shifts may arise through numerous sma…

This https://arxiv.org/abs/2204.07839 has been replaced.
link: https://scholar.google.com/scholar?q=a

Dependence Logics in Temporal Settings
Many forms of dependence manifest themselves over time, with behavior of variables in dynamical systems as a paradigmatic example. This paper studies temporal dependence in dynamical systems from a logical perspective, by enriching a minimal modal base logic of static functional dependencies. We first introduce a logic for dynamical systems featuring temporalized variables, provide a complete axiomatic proof calculus, and show that its satisfiability problem is decidable. Then, to capture expli…

How Academic Freedom and Ukrainian History are under attack, on the example of one dirty campaign: https://benborges.xyz/2024/04/25/how-academic-freedom.html

This https://arxiv.org/abs/2404.15792 has been replaced.
link: https://scholar.google.com/scholar?q=a

Orbits around a black bounce spacetime
In this work, the trajectories of particles around a black bounce spacetime are considered, with the Simpson-Visser model serving as an example. Trajectories for massless and massive particles are obtained through the study of null and time-like geodesics. As the Simpson-Visser solution is derived via the Einstein equations for a source involving nonlinear electrodynamics and a scalar field, photon trajectories are investigated by considering an effective metric in which photons follow null geo…

My current take on the #xz situation, not having read the actual source backdoor commits yet (thanks a lot #Github for hiding the evidence at this point...) besides reading what others have written about it (cf. #rustlang for such central library dependencies would maybe (really big maybe) have made it a bit harder to push a backdoor like this because - if and only if the safety features are used idiomatically in an open source project - reasonably looking code is (a bit?) more limited in the sneaky behavior it could include. We should still very much use those languages over C/C for infrastructure code because the much larger class of unintentional bugs is significantly mitigated, but I believe (without data to back it up) that even such "bugdoor" type changes will be harder to execute. However, given the sophistication in this case, it may not have helped at all. The attacker(s) have shown to be clever enough.
6. Sandboxing library code may have helped - as the attacker(s) explicitly disabled e.g. landlock, that might already have had some impact. We should create better tooling to make it much easier to link to infrastructure libraries in a sandboxed way (although that will have performance implications in many cases).
7. Automatic reproducible builds verification would have mitigated this particular vector of backdoor distribution, and the Debian team seems to be using the reproducibility advances of the last decade to verify/rebuild the build servers. We should build library and infrastructure code in a fully reproducible manner *and* automatically verify it, e.g. with added transparency logs for both source and binary artefacts. In general, it does however not prevent this kind of supply chain attack that directly targets source code at the "leaf" projects in Git commits.
8. Verifying the real-life identity of contributors to open source projects is hard and a difficult trade-off. Something similar to the #Debian #OpenPGP #web-of-trust would potentially have mitigated this style of attack somewhat, but with a different trade-off. We might have to think much harder about trust in individual accounts, and for some projects requiring a link to a real-world country-issued ID document may be the right balance (for others it wouldn't work). That is neither an easy nor a quick path, though. Also note that sophisticated nation state attackers will probably not have a problem procuring "good" fake IDs. It might still raise the bar, though.
9. What happened here seems clearly criminal - at least under my IANAL naive understanding of EU criminal law. There was clear intent to cause harm, and that makes the specific method less important. The legal system should also be able to help in mitigating supply chain attacks; not in preventing them, but in making them more costly if attackers can be tracked down (this is difficult in itself, see point 8) and face risk of punishment after the fact.
H/T @… @… @… @… @…

Construction of free arrangements using point-line operators
Piotr Pokora, Xavier Roulleau
https://arxiv.org/abs/2403.20024 https://a…

Construction of free arrangements using point-line operators
We construct new examples of free curve arrangements in the complex projective plane using point-line operators recently defined by the second author. In particular, we construct a new example of a conic-line arrangement with ordinary quasi-homogeneous singularities that has non-trivial monodromy.

A survey of energies from pure metals to multi-principal element alloys
Ruitian Chen, Evelyn Li, Glenn D. Hibbard, Yu Zou
https://arxiv.org/abs/2402.17121 …

A survey of energies from pure metals to multi-principal element alloys
In materials science, a wide range of properties of materials are governed by various types of energies, including thermal, physicochemical, structural, and mechanical energies. In 2005, Dr. Frans Spaepen used crystalline face-centered-cubic (fcc) copper as an example to discuss a variety of phenomena that are associated with energies. Inspired by his pioneering work, we broaden our analysis to include a selection of representative pure metals with fcc, hexagonal close-packed (hcp), and body-ce…

The "spread" of Thompson's group $F$
Gili Golan
https://arxiv.org/abs/2402.19444 https://arxiv.org/pdf/2402.19444

The "spread" of Thompson's group $F$
Recall that a group $G$ is said to be $\frac{3}{2}$-generated if every non-trivial element $g\in G$ has a co-generator in $G$ (i.e., an element which together with $g$ generates $G$). Thompson's group $V$ was proved to be $\frac{3}{2}$-generated by Donoven and Harper in 2019. It was the first example of an infinite finitely presented non-cyclic $\frac{3}{2}$-generated group. In 2022, Bleak, Harper and Skipper proved that Thompson's group $T$ is also $\frac{3}{2}$-generated. Since the abelianiza…

This https://arxiv.org/abs/2311.06909 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

A Quantum Mechanical Example for Hodge Theory
On the basis of (i) the discrete and continuous symmetries (and corresponding conserved charges), (ii) the ensuing algebraic structures of the symmetry operators and conserved charges, and (iii) a few basic concepts behind the subject of differential geometry, we show that the celebrated Friedberg-Lee-Pang-Ren (FLPR) quantum mechanical model (describing the motion of a single non-relativistic particle of unit mass under the influence of the general spatial 2D rotationally invariant potential) p…

This https://arxiv.org/abs/2401.17189 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Exceptional points and ground-state entanglement spectrum of a fermionic extension of the Swanson oscillator
Motivated by the structure of the Swanson oscillator, which is a well-known example of a non-hermitian quantum system consisting of a general representation of a quadratic Hamiltonian, we propose a fermionic extension of such a scheme which incorporates two fermionic oscillators, together with bilinear-coupling terms that do not conserve particle number. We determine the eigenvalues and eigenvectors, and expose the appearance of exceptional points where two of the eigenstates coalesce with the …

This https://arxiv.org/abs/2311.10265 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

On the dimension of limit sets on $\mathbb{P}(\mathbb{R}^3)$ via stationary measures: the theory and applications
This paper investigates the (semi)group action of $\mathrm{SL}_3(\mathbb{R})$ on $\mathbb{P}(\mathbb{R}^3)$, a primary example of non-conformal, non-linear, and non-strictly contracting action. We study the Hausdorff dimension of a dynamically defined limit set in $\mathbb{P}(\mathbb{R}^3)$ and generalize the classical Patterson-Sullivan formula using the approach of stationary measures. The two main examples are Anosov representations in $\mathrm{SL}_3(\mathbb{R})$ and the Rauzy gasket. 1.…

A majority of the Supreme Court appeared deeply skeptical on Tuesday over efforts to curtail access to a widely used abortion pill, calling into question whether a group of anti-abortion doctors and organizations had a right to challenge the Food and Drug Administration’s approval of the medication.
Describing the case as an effort by “a handful of individuals,” Justice Neil M. Gorsuch raised whether it would stand as “a prime example of turning what could be a small lawsuit into a nat…

Learning the Covariance of Treatment Effects Across Many Weak Experiments
Aur\'elien Bibaut, Winston Chou, Simon Ejdemyr, Nathan Kallus
https://arxiv.org/abs/2402.17637

Learning the Covariance of Treatment Effects Across Many Weak Experiments
When primary objectives are insensitive or delayed, experimenters may instead focus on proxy metrics derived from secondary outcomes. For example, technology companies often infer long-term impacts of product interventions from their effects on weighted indices of short-term user engagement signals. We consider meta-analysis of many historical experiments to learn the covariance of treatment effects on different outcomes, which can support the construction of such proxies. Even when experiments…

This https://arxiv.org/abs/2311.13226 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csRO_…

Robot at the Mirror: Learning to Imitate via Associating Self-supervised Models
We introduce an approach to building a custom model from ready-made self-supervised models via their associating instead of training and fine-tuning. We demonstrate it with an example of a humanoid robot looking at the mirror and learning to detect the 3D pose of its own body from the image it perceives. To build our model, we first obtain features from the visual input and the postures of the robot's body via models prepared before the robot's operation. Then, we map their corresponding latent…

This https://arxiv.org/abs/2311.17835 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

A semigroup with linearithmic Dehn function
It is known that there is no finitely presented group for which the Dehn function lies asymptotically strictly between linear and quadratic functions. This work presents an example of a semigroup that has Dehn function equivalent to $n \log n$, thus it lies strictly inside the said gap. The example is obtained by symmetrizing the rewriting rules of a particular semi-Thue system, which has the derivational complexity function $n \log n$. We also show that such connection is not universal by prov…

Learning the Covariance of Treatment Effects Across Many Weak Experiments
Aur\'elien Bibaut, Winston Chou, Simon Ejdemyr, Nathan Kallus
https://arxiv.org/abs/2402.17637

Learning the Covariance of Treatment Effects Across Many Weak Experiments
When primary objectives are insensitive or delayed, experimenters may instead focus on proxy metrics derived from secondary outcomes. For example, technology companies often infer long-term impacts of product interventions from their effects on weighted indices of short-term user engagement signals. We consider meta-analysis of many historical experiments to learn the covariance of treatment effects on different outcomes, which can support the construction of such proxies. Even when experiments…

A General Framework for Random Effects Models for Binary, Ordinal, Count Type and Continuous Dependent Variables Including Variable Selection
Gerhard Tutz
https://arxiv.org/abs/2404.17792

A General Framework for Random Effects Models for Binary, Ordinal, Count Type and Continuous Dependent Variables Including Variable Selection
A general random effects model is proposed that allows for continuous as well as discrete distributions of the responses. Responses can be unrestricted continuous, bounded continuous, binary, ordered categorical or given in the form of counts. The distribution of the responses is not restricted to exponential families, which is a severe restriction in generalized mixed models. Generalized mixed models use fixed distributions for responses, for example the Poisson distribution in count data, whi…

This https://arxiv.org/abs/2110.13686 has been replaced.
link: https://scholar.google.com/scholar?q=a

Dynamical Systems on Graph Limits and Their Symmetries
The collective dynamics of interacting dynamical units on a network crucially depends on the properties of the network structure. Rather than considering large but finite graphs to capture the network, one often resorts to graph limits and the dynamics thereon. We elucidate the symmetry properties of dynamical systems on graph limits -- including graphons and graphops -- and analyze how the symmetry shape the dynamics, for example through invariant subspaces. In addition to traditional symmetri…

Closedness of the singular locus and generation for derived categories
Souvik Dey, Pat Lank
https://arxiv.org/abs/2403.19564 https://…

Closedness of the singular locus and generation for derived categories
This work is concerned with a relationship regarding the closedness of the singular locus of a Noetherian scheme and existence of classical generators in its category of coherent sheaves, associated bounded derived category, and singularity category. Particularly, we extend an observation initially made by Iyengar and Takahashi in the affine context to the global setting. Furthermore, we furnish an example a Noetherian scheme whose bounded derived category admits a classical generator, yet not …