Tootfinder

Map view of Mastodon
https://fediverse.observer/map

Urgent action UK readers as MAP’s lifesaving clinic in Gaza forced to close under new displacement order
Please call your MP today, the last day of parliament.
Demand that,
they call on Keir Starmer and David Lammy to:
*urge Israel to rescind these latest evacuation orders
*suspend all arms transfers to Israel, including parts for F-35 fighter jets
*take all possible steps to hold all perpetrators accountable.
Medical Aid for Palestinians

MAP’s lifesaving clinic in Gaza forced to suspend services amid Israel’s latest displacement orders - Latest News & Developments - Medical Aid for Palestinians
This morning, the Israeli military issued new forced displacement orders which directly endanger vital humanitarian and primary healthcare sites, including those provided by MAP.

A look at Swerve Sports, a FAST TV channel for women's sports launched by veteran TV executive Christy Tanner, as FAST TV grows despite data challenges (Claire Atkinson/The Media Mix)
https://www.themediamix.co/p/the-former-cbs-news-boss-bootstrapping
…

The Former CBS News Boss Bootstrapping a Women’s Sports Start-Up.
Christy Tanner is ready for a FAST fight to get more data from the platforms and put women's sport on the map. Plus streaming is almost half of all viewing now.

Good real pictures of corank one map germs from the $n$-space to the $(n 1)$-space
R. Gim\'enez Conejero, Ignacio Breva Ribes
https://arxiv.org/abs/2507.13467

Good real pictures of corank one map germs from the $n$-space to the $(n+1)$-space
We study corank one $A$-finite germs $f:(\mathbb{R}^n,0)\rightarrow (\mathbb{R}^{n+1},0)$ and their complexifications. More precisely, we study when these germs provide good real pictures of the complex germs, i.e., when there is a real deformation that has the same homology in the image (hence, homotopy) than the generic complex deformation. We give a new sufficient condition that can be computed in practice, as well as examples.

Just finished Transiruby, along with a 9k-line journal file for it. I almost got 100, but not quite; I don't have time to go back to it before the semester starts though.
If you like exploration games, it's an excellent one, with great level design & tons of secrets. It actually makes you do significant secret-finding and map-reading in order to beat the game, not just for extras or a special ending, which is something that a lot of metroidvania games since Super Metroid don't do. My one complaint is that the map system isn't perfect, and finding obscure secrets to progress is fine when the map hints at them but much less fun when it hints incorrectly (I looked one progress item up in a speedrun video because of this).
Decently cool movement mechanics, although the combat does take a back seat and almost all of the bosses are easy (I beat the final two bosses in the third and second tries respectively). I don't think that's any better or worse than a game like Nine Sols where the final boss took me hundreds of tries though; just a different flavor. The world-building isn't as rich as the more epic metroidvanias like Hollow Knight or Lone Fungus (or again, Nine Sols) but again I'm fine with that. It's just a more casual game that has really excellent level design & exploration poetics.
#AmPlaying

Analytical phase boundary of a quantum driven-dissipative Kerr oscillator from classical stochastic instantons
Th\'eo S\'epulcre
https://arxiv.org/abs/2508.13925 https:/…

Analytical phase boundary of a quantum driven-dissipative Kerr oscillator from classical stochastic instantons
The framework of Keldysh path integral concisely describes quantum systems driven away from thermal equilibrium, such as the two-photon driven Kerr oscillator. Within the thermodynamic limit of diverging photon occupation, we map it to a Martin-Siggia-Rose-Janssen-de Dominicis path integral, and obtain a purely classical, stochastic equivalent where photon self-interaction plays the role of temperature. This perspective sheds light on the difficulties encountered in the search for an effective …

wiki_science: Wikipedia Map of Science (2020)
A network of scientific fields, extracted from the English Wikipedia in early 2020. Nodes are wikipedia pages representing natural, formal, social and applied sciences, and two nodes are linked if the cosine similarity of the page content is above a threshold. See <http://www.s…

Susceptibility Distortion Correction of Diffusion MRI with a single Phase-Encoding Direction
Sedigheh Dargahi, Sylvain Bouix, Christian Desrosier
https://arxiv.org/abs/2508.13340

Susceptibility Distortion Correction of Diffusion MRI with a single Phase-Encoding Direction
Diffusion MRI (dMRI) is a valuable tool to map brain microstructure and connectivity by analyzing water molecule diffusion in tissue. However, acquiring dMRI data requires to capture multiple 3D brain volumes in a short time, often leading to trade-offs in image quality. One challenging artifact is susceptibility-induced distortion, which introduces significant geometric and intensity deformations. Traditional correction methods, such as topup, rely on having access to blip-up and blip-down ima…

Bedrock Ocean, which has developed an autonomous underwater vehicle to map the ocean floor using sonar and magnetic sensors, raised a $25M Series A-2 (Tim De Chant/TechCrunch)
https://techcrunch.com/2025/06/10/bedrock-ocean-dredges-u…

Exclusive: Bedrock Ocean dredges up $25M to map the seafloor with robots | TechCrunch
Bedrock Ocean wants to use autonomous underwater vehicles to make mapping the seafloor faster and cheaper.

Seen David Attenborough's film Ocean? Track countries' progress in signing and ratifying the High Seas Treaty, needed to protect 30% of the oceans.
https://highseasalliance.org/treaty-ratification/map/
Here's Europe:
orange = signed only,

High Seas Treaty Ratification Map
At least 60 countries must sign and ratify the High Seas Treaty for it to become international law. Follow progress and see who has signed and ratify the treaty on the world map.

Excellent: “the new site and map are designed to help roll out EV charging faster and more efficiently in the places they are best for consumers and where they can be most readily supported by the grid.”
https://thedriven.io/2025/07/18/ev-map

EV mapping tool and one-stop shop launched to identify charging locations and help buyers
Australia government launches new EV mapping tool to help locate chargers in right place, as part of a one-stop shop to help consumers make decisions about electric vehicles.

Data Center Map - Colocation, Cloud and Connectivity
Do you want to check where your data is geographically located or which providers are your "neighbors"? Here you can watch it online worldwide – in other words: virtual reality in real world gegography.
🗺️ https://www.datacentermap.com

Align Your Flow: Scaling Continuous-Time Flow Map Distillation
Amirmojtaba Sabour, Sanja Fidler, Karsten Kreis
https://arxiv.org/abs/2506.14603 https://

Align Your Flow: Scaling Continuous-Time Flow Map Distillation
Diffusion- and flow-based models have emerged as state-of-the-art generative modeling approaches, but they require many sampling steps. Consistency models can distill these models into efficient one-step generators; however, unlike flow- and diffusion-based methods, their performance inevitably degrades when increasing the number of steps, which we show both analytically and empirically. Flow maps generalize these approaches by connecting any two noise levels in a single step and remain effecti…

Democrats are returning to Texas, clearing way for GOP to draw new map (Washington Post)
https://www.washingtonpost.com/politics/2025/08/18/texas-redistricting-democrats-return/
http://www.memeorandum.com/250818/p63#a250818p63

Glad that someone informed me that my side project https://busrouter.sg is featured on CNA Insider's Singapore Hour "The Unseen Side of Singapore’s Bus System", under the chapter "Woodlands Bus Depot: The Eyes and Ears of Singapore’s Bus System" (04:08)

A translation of the paper "Presentation of some observations that could be made to shed light on Meteorology" by Johann Heinrich Lambert (1771)
Pascal Marquet
https://arxiv.org/abs/2507.13422

A translation of the paper "Presentation of some observations that could be made to shed light on Meteorology" by Johann Heinrich Lambert (1771)
The paper is an English translation of the 1771 old-French paper by Johann Heinrich Lambert in the "Mémoires de l'Académie Royale des Sciences et Belles-Lettres de Berlin" where he imagined in a prophetic way the same present global meteorological observation system. Johann Heinrich Lambert is the same polymath who also defined the azimuthal, cylindrical and conical equal area, as well as conformal conic map projections still used in Meteorology to plot the weather maps: the so-called Lambert…

Going to #NoKings Saturday? Try to recruit the newly radicalizing to defunding the police, to defending all in our communities facing displacement—immigrant, queer, unhoused, unable to pay rent—in short, to fighting local fascisms, so we can better fight national fascism, at ICE centers

ASC-SW: Atrous strip convolution network with sliding windows for visual-assisted map navigation
Cheng Liu, Fan Zhu, Yaoyu Zhuang Zhinan Chen Jiefeng Tang
https://arxiv.org/abs/2507.12744

ASC-SW: Atrous strip convolution network with sliding windows for visual-assisted map navigation
With the rapid development of lightweight visual neural network architectures, traditional high-performance vision models have undergone significant compression, greatly improving their computational efficiency and energy consumption ratio. This makes them feasible for deployment on resource-constrained edge computing devices. We propose a visual-assisted navigation framework called Atrous Strip Convolution-Sliding Window (ASC-SW), which leverages a depth camera and a lightweight visual neural …

I definitely did not expect to get in 11 miles today! It's getting pretty warm/hot in the mornings though. I was out at 6:30am and that was even a bit too warm.
#bikeTooter #bike #mke

Spatially Resolved [O III] Emission Line Kinematics of Reverberation-Mapped AGNs with the Keck Cosmic Web Imager
Raymond P. Remigio, Vivian U, Aaron J. Barth, Nico Winkel, Vardha N. Bennert, Tommaso Treu, Matthew A. Malkan, Sebastian Contreras, Peter R. Williams, Jordan N. Runco, Liam Hunt
https://arxiv.org/abs/2508.14304

Spatially Resolved [O III] Emission Line Kinematics of Reverberation-Mapped AGNs with the Keck Cosmic Web Imager
We present optical integral-field spectroscopic data of ten nearby ($0.02\leq z \leq 0.05$) Seyfert 1 galaxies taken with the Keck Cosmic Web Imager (KCWI). We map the spatially resolved kinematics of the [O III] gas and stars, and investigate the alignments between their global kinematic position angles (PA). Large-scale gas motions are primarily dominated by rotation, and are kinematically aligned with the stars ($Δ\text{PA}\leq 30$ deg). However, eight galaxies exhibit non-rotational kinema…

Towards Efficient Hash Maps in Functional Array Languages
William Henrich Due, Martin Elsman, Troels Henriksen
https://arxiv.org/abs/2508.11443 https://arx…

Towards Efficient Hash Maps in Functional Array Languages
We present a systematic derivation of a data-parallel implementation of two-level, static and collision-free hash maps, by giving a functional formulation of the Fredman et al. construction, and then flattening it. We discuss the challenges of providing a flexible, polymorphic, and abstract interface to hash maps in a functional array language, with particular attention paid to the problem of dynamically sized keys, which we address by associating each hash map with an arbitrary context. The al…

icemap.dev, a volunteer-run live map of confirmed ICE activity across the U.S., shared in case it helps someone stay informed and safe

Another hole in the Flightradar map.

Air quality map of the entire planet. Apparently Earth is mostly not a good place to breathe right now.
Is this…normal? I haven’t seen this kind of simultaneous global AQI map before, and wonder how typical this is for August (in the past decade, century, millennium).
(Source: https://www.iqair.com/us/air-quality-map Turn off stations & fires on the right side to get the image below.)

Binomial maps: stochastically evolving iterated integer maps for finite population
Snehal M. Shekatkar
https://arxiv.org/abs/2508.11974 https://arxiv.org/p…

Binomial maps: stochastically evolving iterated integer maps for finite population
Deterministic nature of iterated map models of population dynamics is justifiable for infinite-sized populations, as the stochastic fluctuations are negligible in this limit. However, they are ill-suited for finite-population systems where finite-size effects like demographic noise and extinction cannot be ignored. Adding noise to the equations cannot model the demographic noise as it can only represent environmental stochasticity. An approach, sometimes used in ecological literature, but surpr…

#Clojure map-interval
Like `map` -- apply function `f` to each element in `col` in turn and return the values returned in sequence, but in a single thread and pausing between each invocation of `f`.

Useful for example in circumstances where you're querying a rate-limited service.

Map, but with a delay
Map, but with a delay. GitHub Gist: instantly share code, notes, and snippets.

Top GOP Map-Drawer and Right-Wing Law Firm Team Up to Target Texas Minority Voters - Democracy Docket
https://www.democracydocket.com/analysis/top-gop-map-drawer-and-right-wing-law-firm-team-up-to-target-minority-voters-in-texas/

I don't want to live forever, I just want to live long enough to... (list in alphabetical order by verb):
- climb every mountain, hill, and cliff
- hug every pillow, plushie, and stuffed animal
- learn every language
- listen to every song, podcast, radio show, and sound effect
- meet every person, animal, and other living being
- play every video game, board game, sport, and musical instrument
- read every book, newspaper article, website, and social media post
- run every computer program
- sleep on every bed, couch, and futon
- swim in every lake, river, and other body of water
- view every painting, sculpture, photograph, map, and other work of art
- visit every city, landmark, historic site, and protected area
- watch every movie, TV show, video, and theater production
...that all shouldn't take too long, right?

A map of areas at risk of losing public radio and TV access due to CPB cuts and a chart of the average share of station funding from federal sources by state (New York Times)
https://www.nytimes.com/interactive/2025/07/18/business/media/house-…

Where Congress’s Cuts Threaten Access to PBS and NPR
The loss of federal funding threatens scores of public TV and radio stations across the United States.

Diode Effect for Skyrmions Interacting with Linear Protrusion Defects
J. C. Bellizotti Souza, C. J. O. Reichhardt, C. Reichhardt, N. P. Vizarim, P. A. Venegas
https://arxiv.org/abs/2508.12090

Diode Effect for Skyrmions Interacting with Linear Protrusion Defects
We simulate collectively interacting skyrmions in a channel with periodic asymmetry, and find a strong diode effect for the skyrmion flow. There is also an asymmetry in the skyrmion annihilation rate for currents applied along the hard or easy substrate asymmetry direction, with a higher annihilation rate for hard direction currents. We map out the diode efficiency as a function of magnetic field and substrate asymmetry angle. We also show that the Magnus force impacts the diode motion and anni…

«I believe that the web, like Nokia, was created to connect people. Some create things, some watch or read those, and connections are formed. LLMs […] destroy the human element of the web, and of the real world too, because those are too interconnected now. […] By using LLMs in a collaborative context, you cheat: you introduce errors and invite everybody to find them»
A really lovely interview with @… ! Come for the map talk, stay for the community insight
https://www.apc.org/en/news/every-door-going-map-user-open-source-map-creator

Crowdsourced map of Flock ALPRs (automated license plate readers):
https://deflock.me/map

DeFlock
Spot, map, and resist automated license plate readers (ALPRs) near you.

Well this has been fun!
Experimenting building a chrome extension for detecting schema markup on a webpage.

Choosing iteration maps for the parallel Pollard rho method
Finn Rudolph
https://arxiv.org/abs/2506.12844 https://arxiv.org/pdf/2506.…

Choosing iteration maps for the parallel Pollard rho method
Pollard's rho method finds a prime factor $p$ of an integer $N$ by searching for a collision in a map of the form $x \mapsto x^{2k} + c$ modulo $N$. This search can be parallelized to multiple machines, which may use distinct parameters $k$ and $c$. In this paper, we give an asymptotic estimate for the expected running time of the parallel rho method depending on the choice of $k$ for each machine. We also prove that $k = 1$ is the best choice for one machine, if nothing about $p$ is known in a…

On the relaxation of polyconvex functionals with linear growth under strict convergence in $BV$
Riccardo Scala
https://arxiv.org/abs/2508.11041 https://arx…

On the relaxation of polyconvex functionals with linear growth under strict convergence in $BV$
We consider the relaxation of polyconvex functionals with linear growth with respect to the strict convergence in the space of functions of bounded variation. These functionals appears as relaxation of $F(u,Ω):=\int_Ωf(\nabla u)dx$, where $u:Ω\rightarrow \mathbb R^m$, and $f$ is polyconvex. In constrast with the case of relaxation with respect to the standard $L^1$-convergence, in the case that $Ω$ is $2$-dimensional, we prove that the sets map $A\mapsto F(u,A)$ for $A$ open, is, for every …

wiki_science: Wikipedia Map of Science (2020)
A network of scientific fields, extracted from the English Wikipedia in early 2020. Nodes are wikipedia pages representing natural, formal, social and applied sciences, and two nodes are linked if the cosine similarity of the page content is above a threshold. See <http://www.s…

I installed @… earlier and transferred my bookmarks from @…. It was unsurprisingly seamless given the apps' shared codebase. CoMaps' slightly different map color scheme threw me off just a li'l bit though. 🗺

out today: the #GratefulDead's new 60-CD "enjoying the ride" box. i wrote a ton of liner notes for this, including mini-essays about all the shows & venues, tour lore, & many maps. play with an interactive map: https://tmns.dead.n…

Take a trip to the fantastical land of the Grateful Dead
Follow the Heady Highway to discover storied venues that hosted legendary live performances by the Dead from shows spanning 25 years

Replaced article(s) found for physics.ins-det. https://arxiv.org/list/physics.ins-det/new
[1/1]:
Open-Source Benchtop Magnetophotometer (MAP) for Characterizing the Magnetic Susceptibility of Su...

I don't know the San Fran area well enough to know if this makes sense, #NewJersey
https://www.instagram.com/p/DNJB_Yz0RQu/?utm_source=ig_web_copy_link

Visual mental imagery and #aphantasia lesions map onto a convergent brain network https://www.medrxiv.org/content/10.1101/2025.05.23.25328072v1 by @…

Visual Mental Imagery and Aphantasia Lesions Map onto a Convergent Brain Network
Background Visual mental imagery, the ability to volitionally form perceptual representations without corresponding external stimuli, allows reliving of past events, solving problems and imagining the future. The absence of visual mental imagery, called aphantasia, has recently been recognized to occur in about 1% of the general population but the cause is uncertain. By studying rare cases of acquired aphantasia we can identify regions that when injured cause loss of visual mental imagery. Met…

Nach einem Brandanschlag auf ein Umspannwerk(?) in Südfrankreich ist dort das Netz teilweise zusammengebrochen. Zeitweise waren mehr als 160k Haushalte betroffen, u.A. auch in Cannes, wo grade das gleichnamige Filmfestival stattfindet.
Spekulation: Dürfte im Bereich Poste électrique du Biançon gewesen sein. Wichtiger Knotenpunkt mit 400/225kV und nem 20MW Wasserkraftwerk (Barrage de Saint-Cassien) dran.

🍉🚲 Ride for Palestine! 🚲🍉
This July we will be slow riding with a larger event hosted by the Middle East Children's Alliance (MECA).
When: Sunday, July 20th at 8:30 AM
Roll: 9:00 AM
Where: Meet at MECA HQ @ 1101 8th Street, Berkeley
Register with team SSR https://bit.ly/J20RFP_SSR

Great chart of #SEAsia's largest urban parks. Should be an national embarrassment how far down you have to scroll to find the any #city #park from one country in particular, the name of which wouldn't surprise any…

Largest urban parks in Southeast Asia
A list of the largest urban parks in Southeast Asia. Urban parks in Southeast Asia map [Map of urban parks in Southeast Asia.] Notes about the urban park list This is an ongoing list that I am coll…

on my blog!
p-fast trie: lexically ordered hash map
https://dotat.at/@/2025-08-04-p-fast-trie.html
trie lookups in O(log k) where k is the key length
asymptotically faster than the usual O(k) trie lookup, but at what cost in memory?

Went for a 10.7km (6.7 mile) hike in the glorious weather this evening. So many pictures to share, but I am tired!

A Diestel-Faires type result for multimeasures
Jos\'e Rodr\'iguez
https://arxiv.org/abs/2506.11872 https://arxiv.org/pdf/2506…

A Diestel-Faires type result for multimeasures
Let $X$ be a real Banach space and let $Y \subseteq X^*$ be a linear subspace having the Orlicz-Thomas property, that is, for each $σ$-algebra $Σ$ and for each map $ν:Σ\to X$, the countable additivity of the composition $x^*\circ ν$ for all $x^*\in Y$ implies the countable additivity of $ν$. We show that the Orlicz-Thomas property allows to test countable additivity of set-valued maps. Namely, if $M$ is a map defined on a $σ$-algebra $Σ$ whose values are convex, $σ(X,Y)$-compact, bound…

Somehow I managed 9.54 miles today in 48 minutes with an average speed of 12mph... I guess I made up for yesterday when I only did 4 indoor miles.
#biking #bikeTooter #mke

Really not a fan of this watch. I sort of hate it a bit. I knew I wouldn't like it before I bought it. I actually bought it mainly to check on some things and see how #Skmei is progressing in certain areas. However even with my low expectations it is disappointing.

I love this map, seen at the American Museum in Bath. The creatures are closer to reality than many such maps, but still very much mythical.
Map of the Polar Regions
Theodor de Bry (1528-1598) Copperplate engraving, Frankfurt, 1601
#Art #maps

Adding structure to generalized additive models, with applications in ecology
David L Miller, Ken Newman, Thomas Cornulier
https://arxiv.org/abs/2508.07915 https://

Adding structure to generalized additive models, with applications in ecology
Generalized additive models (GAMs) that connect a set of scalar covariates that map 1-1 to a response variable are commonly employed in ecological and other scientific disciplines. However, covariates are often inherently non-scalar, taking on multiple values for each observation of the response. They can sometimes have a temporal structure, e.g., a time series of temperature and precipitation measurements, or a spatial structure, e.g., multiple soil pH measurements made at nearby locations. Wh…

MapLibre Tile: A Next Generation Vector Tile Format
Markus Tremmel, Roland Zink
https://arxiv.org/abs/2508.10791 https://arxiv.org/pdf/2508.10791

MapLibre Tile: A Next Generation Vector Tile Format
The Mapbox Vector Tile (MVT) format is widely considered the leading open standard for large-scale map visualization, as evidenced by its widespread adoption by major technology companies such as AWS, Meta, and Microsoft for their products and services. However, MVT was developed nearly a decade ago and, consequently, does not fully align with the capabilities of new geospatial data sources that are characterized by rapidly increasing data volumes due to advancements in geospatial sensors and a…

Guiding WaveMamba with Frequency Maps for Image Debanding
Xinyi Wang, Smaranda Tasmoc, Nantheera Anantrasirichai, Angeliki Katsenou
https://arxiv.org/abs/2508.11331 https://

Guiding WaveMamba with Frequency Maps for Image Debanding
Compression at low bitrates in modern codecs often introduces banding artifacts, especially in smooth regions such as skies. These artifacts degrade visual quality and are common in user-generated content due to repeated transcoding. We propose a banding restoration method that employs the Wavelet State Space Model and a frequency masking map to preserve high-frequency details. Furthermore, we provide a benchmark of open-source banding restoration methods and evaluate their performance on two p…

Trump started a redistricting war. Only Congress can stop it. (Richard L. Hasen/MSNBC)
https://www.msnbc.com/opinion/msnbc-opinion/trump-texas-redistricting-map-congress-voters-rcna223094
http://www.memeorandum.com/250805/p76#a250805p76

Quantized nonlinear kink movement through topological boundary state instabilities
Markus Bestler, Oded Zilberberg
https://arxiv.org/abs/2508.12101 https://

Quantized nonlinear kink movement through topological boundary state instabilities
Thouless pumping is a paradigmatic example of topologically protected, directed transport in linear systems. Recent extensions to nonlinear pumps often overlook the need to reassess the conventional framework of linear topology. In this work, we study a nonlinear dimer-chain model that exhibits quantized transport of kinks under a periodic modulation of a pumping parameter. Crucially, linear excitations in the system map to a Rice-Mele model and display topological boundary modes localized at t…

Boggles my mind that I can, on a whim, take a day trip to see my favorite building in the world at a great price with several fast trains *per hour*. (Why on a whim? Because I never even considered it, based on the map.) Italian rail is quite something. #Italy25

A Unified Theory of Compositionality, Modularity, and Interpretability in Markov Decision Processes
Thomas J. Ringstrom, Paul R. Schrater
https://arxiv.org/abs/2506.09499

A Unified Theory of Compositionality, Modularity, and Interpretability in Markov Decision Processes
We introduce Option Kernel Bellman Equations (OKBEs) for a new reward-free Markov Decision Process. Rather than a value function, OKBEs directly construct and optimize a predictive map called a state-time option kernel (STOK) to maximize the probability of completing a goal while avoiding constraint violations. STOKs are compositional, modular, and interpretable initiation-to-termination transition kernels for policies in the Options Framework of Reinforcement Learning. This means: 1) STOKs can…

A note on multiset reconstruction from sum and pairwise products
Stella Jiahui Li
https://arxiv.org/abs/2508.00971 https://arxiv.org/pdf/2508.00971

A note on multiset reconstruction from sum and pairwise products
Ballantine, Beck, and Merca defined a map $\mathrm{pre}_2$, which sends an integer partition $λ= (λ_1, \dots, λ_{\ell})$ to the set $\{λ_iλ_j : 1 \leq i < j \leq \ell\}$ consisting of the pairwise products of parts of $λ$. The same three authors and Sagan conjectured that for each $n$, the map $\mathrm{pre}_2$ is injective on the set of integer partitions of $n$. In this note, we prove their conjecture.

This https://arxiv.org/abs/2407.13448 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Pure maps are strict monomorphisms
We prove that $i)$ if $\mathcal{A}$ is $λ$-accessible and it is axiomatizable in (finitary) coherent logic then $λ$-pure maps are strict monomorphisms and $ii)$ if there is a proper class of strongly compact cardinals and $\mathcal{A}$ is $λ$-accessible then for some $μ\vartriangleright λ$ every $μ$-pure map is a strict monomorphism.

Envisioning Generative Artificial Intelligence in Cartography and Mapmaking
Yuhao Kang, Chenglong Wang
https://arxiv.org/abs/2508.09028 https://arxiv.org/p…

Envisioning Generative Artificial Intelligence in Cartography and Mapmaking
Generative artificial intelligence (GenAI), including large language models, diffusion-based image generation models, and GenAI agents, has provided new opportunities for advancements in mapping and cartography. Due to their characteristics including world knowledge and generalizability, artistic style and creativity, and multimodal integration, we envision that GenAI may benefit a variety of cartographic design decisions, from mapmaking (e.g., conceptualization, data preparation, map design, a…

Even took two #panoramax images from the summit 😁 https://panoramax.openstreetmap.fr/?background=streets&focus=map&map=17/-30.958606/-64.323701&speed=250

First day without rain.
Right after work we brought our car to some maintenance and drove back by bike. Well not the direct way, but a fun way 😊
It felt really good!
#cycling #BikeTooter #getoutside

Protests over Trump’s ICE raids continue spreading to other major cities | The Independent
https://www.independent.co.uk/news/world/americas/anti-trump-ice-immigration-raid-protests-map-b2768518.html

Tensor Renormalization Group Meets Computer Assistance
Nikolay Ebel, Tom Kennedy, Slava Rychkov
https://arxiv.org/abs/2506.03247 https://

Tensor Renormalization Group Meets Computer Assistance
Tensor renormalization group, originally devised as a numerical technique, is emerging as a rigorous analytical framework for studying lattice models in statistical physics. Here we introduce a new renormalization map - the 2x1 map - which coarse-grains the lattice anisotropically by a factor of two in one direction followed by a 90-degree rotation. We develop a novel graphical language that translates the action of the 2x1 map into a system of inequalities on tensor components, with rigorous e…

Chow cohomology and Lefschetz (1,1)-theorem
Ananyo Dan, Inder Kaur
https://arxiv.org/abs/2506.13220 https://arxiv.org/pdf/2506.13220

Chow cohomology and Lefschetz (1,1)-theorem
Any smooth, projective variety satisfies the Hodge conjecture in codimension one, known as the Lefschetz (1,1) theorem. Totaro formulated a version for singular varieties. He asked whether the natural Bloch-Gillet-Soulé cycle class map from the operational Chow group to the (1,1)-classes in the weight graded piece of the cohomology group is surjective? In this short article, we give a sufficient criterion for this to hold. In particular, we show that several singular varieties with at worst is…

GÉANT’s GN4-3N project is a finalist in the European Digital Connectivity Awards 2025 🎉
We’re honoured to be nominated in the “Cross-border and international connectivity” category, recognising the GN4-3N project’s role in building a more inclusive, resilient, and future-proof network infrastructure for the European #Research &

On Chaos in QFT
Jacob Sonnenschein, Nadav Shrayer
https://arxiv.org/abs/2506.10784 https://arxiv.org/pdf/2506.10784

On Chaos in QFT
In this note we explore the chaotic behavior of non-integrable QFTs and compare them to integrable ones. We choose as prototypes the double sine-Gordon and the sine-Gordon models. We analyze their discrete spectrum determined by a truncation method. We examine the map of the corresponding energy eigenvalues to the eigenvalues of the random matrix theory (RMT) Gaussian orthogonal ensemble (GOE). This is done by computing the following properties: (a) The distribution of the adjacent spacings and…

On ball expanding maps
Noriaki Kawaguchi
https://arxiv.org/abs/2507.04744 https://arxiv.org/pdf/2507.04744

On ball expanding maps
We study the dynamical properties of ball expanding maps, a class of continuous self-maps defined on compact metric spaces. For a ball expanding map, we show that: (1) the set of periodic points is dense in the chain recurrent set; (2) if the topological entropy of the map is zero, then the chain recurrent set is finite; (3) the map has only finitely many chain components; (4) if the space is perfect, then the topological entropy of the map is positive; and (5) if the space is connected, then t…

The {esquisse} package makes it easy to plot your data in different ways with a drag and drop interface: #rstats

Explore and Visualize Your Data Interactively
A shiny gadget to create ggplot2 figures interactively with drag-and-drop to map your variables to different aesthetics. You can quickly visualize your data accordingly to their type, export in various formats, and retrieve the code to reproduce the plot.

The Szczarba map and the cubical cobar construction
Matthias Franz
https://arxiv.org/abs/2507.01669 https://arxiv.org/pdf/2507.01669

The Szczarba map and the cubical cobar construction
We consider a twisting function from a 1-reduced simplicial set $X$ to a simplicial group $G$. We prove in detail that the associated Szczarba operators induce a simplicial map from the triangulation of the cubical cobar construction of $X$ to $G$. This confirms a result due to Minichiello-Rivera-Zeinalian and gives, as pointed out by these authors, a conceptual proof of the fact that the dga map $Ω\,C(X) \to C(G)$ induced by Szczarba's twisting cochain is comultiplicative.

NASA: May 2025 was the 2nd warmest May on record, globally: 1.07°C above the 1951-1980 average. Only May 2024 was warmer.
Highest anomalies in the Siberian Arctic, Central Asia, and the West-Antarctic.
#globalwarming #ClimateChange

Supermarket chain Lidl is making its heavy-duty vehicle chargers at depots in the Netherlands available to other truck users by prior arrangement. This is a great way to increase charger (and on-site renewables!) utilisation and extend truck charging options!
https://corporate.lidl.nl/duurzaamheid

fly_hemibrain: Fly hemibrain (2020)
A synaptic map of the hemibrain connectome of fruit fly Drosophila melanogaster. Nodes are neurons, and edges are synaptic connections, traced individually from brain image sections using EM reconstruction techniques. Neurons are labeled by their type. Edges are annotated by the connection strength between the neurons.
This network has 21739 nodes and 4259624 edges.
Tags: Biological, Connectome, Weighted, Metadata

Hey Google,
Now We Have This New Private, Offline Alternative:
A maps app that doesn't track you but lets you record your path on the map
https://news.itsfoss.com/comaps-launch/

Look Google, We Have This New Private, Offline Alternative Now
A maps app that doesn't track you but lets you track your path on the map. A pathbreaking open source alternative.

A stylized map of #Manila, #Philippines 🇵🇭 on the wall at the Sheraton Manila Bay's restaurant.
#MapsInTheWild

See the Countries Under Trump's New Travel Ban (Allison McCann/New York Times)
https://www.nytimes.com/interactive/2025/06/04/us/politics/trump-travel-ban-map.html
http://www.memeorandum.com/250605/p4#a250605p4

Level structures on parahoric torsors and complete integrability
Georgios Kydonakis, Lutian Zhao
https://arxiv.org/abs/2506.12302 https://

Level structures on parahoric torsors and complete integrability
For a smooth complex algebraic curve $X$ and a reduced effective divisor $D$ on $X$, we introduce a notion of $D$-level structure on parahoric $\mathcal{G}_{\boldsymbol θ}$-torsors over $X$, for any connected complex reductive Lie group $G$. A moduli space of parahoric $\mathcal{G}_{\boldsymbol θ}$-torsors equipped with a $D$-level structure is constructed and we identify a canonical moment map with respect to the action of a level group on this moduli space. This action extends to a Poisson …

This https://arxiv.org/abs/2505.10018 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csRO_…

LEMON-Mapping: Loop-Enhanced Large-Scale Multi-Session Point Cloud Merging and Optimization for Globally Consistent Mapping
Multi-robot collaboration is becoming increasingly critical and presents significant challenges in modern robotics, especially for building a globally consistent, accurate map. Traditional multi-robot pose graph optimization (PGO) methods ensure basic global consistency but ignore the geometric structure of the map, and only use loop closures as constraints between pose nodes, leading to divergence and blurring in overlapping regions. To address this issue, we propose LEMON-Mapping, a loop-enha…

Semantic Subtyping for Maps in Erlang
Erdem Yildirim, Albert Schimpf, Stefan Wehr, Annette Bieniusa
https://arxiv.org/abs/2508.00482 https://arxiv.org/pdf/…

Semantic Subtyping for Maps in Erlang
In this paper we will construct a set-theoretic model of types featuring type variables, base types, set-theoretic types and map types. Syntax of map types spans all the map types available in Erlang. The model of types is used to define a semantic subtyping relation based on set containment. The novelty of this work is the definition of subtyping over parameteric map types.

Measuring the dynamics of an XXZ quantum simulator and controlling collapse through symmetries
D. J. Papoular
https://arxiv.org/abs/2508.02468 https://arxi…

Measuring the dynamics of an XXZ quantum simulator and controlling collapse through symmetries
We theoretically consider the quantum simulation of a spin Hamiltonian whose twelve sites are arranged in a planar configuration with high spatial symmetry, $D_{6h}$. We map the system onto an effective fermionic Hamiltonian and identify its symmetry group. Comparing different initial states evolving under the Heisenberg or XXZ Hamiltonians, we analyze the impact of symmetry on the probability distribution for the outcomes of a measurement in a given basis, as a function of the evolution time. …

Str\"omgren photometric metallicity map of the Magellanic Cloud stars using Gaia DR3--XP spectra
Abinaya O. Omkumar, Maria-Rosa L. Cioni, Smitha Subramanian, Jos de Bruijne, Aparna Nair, Bruno Dias
https://arxiv.org/abs/2506.10749

Strömgren photometric metallicity map of the Magellanic Cloud stars using Gaia DR3--XP spectra
One important key in understanding a galaxy's evolution is to study the consequences of its past dynamical interactions that influenced its shape. By measuring the metallicity distribution of stellar populations with different ages, one can learn about these interactions. The Magellanic Clouds, being the nearest pair of interacting dwarf galaxies with a morphology characterised by different tidal and kinematic sub-structures as well as a vast range of stellar populations, represent an excellent…

Sometimes I'm falsely credited with discovering the North Bernal Wiggle, the low-traffic bike route up to Bernal Heights Park that avoids steeper slopes. But it was actually Brian Coyne who told me about it.

Springtime in Spain: Sevilla airport already hit 40°C today!
Map: https://www.aemet.es/es/eltiempo/observacion/ultimosdatos?k=and&w=1&datos=img&f=tmax

El Tiempo. Hoy y últimos días: Andalucía - Resumen jueves 29 - Mapa - Temperatura máxima (°C) - Agencia Estatal de Meteorología - AEMET. Gobierno de España
El Tiempo. Datos horarios y resúmenes diarios de la red de estaciones automáticas: Andalucía - Resumen jueves 29 - Mapa - Temperatura máxima (°C)

HeadZoom: Hands-Free Zooming and Panning for 2D Image Navigation Using Head Motion
Kaining Zhang, Catarina Moreira, Pedro Belchior, Gun Lee, Mark Billinghurst, Joaquim Jorge
https://arxiv.org/abs/2508.01765

HeadZoom: Hands-Free Zooming and Panning for 2D Image Navigation Using Head Motion
We introduce \textit{HeadZoom}, a hands-free interaction technique for navigating two-dimensional visual content using head movements. The system enables fluid zooming and panning by only using real-time head tracking. It supports natural control in applications such as map exploration, radiograph inspection, and image browsing, particularly where physical interaction is limited. We evaluated HeadZoom in a within-subjects user study comparing three interaction techniques-Static, Tilt Zoom, and …

Wikipedia has a population density map for Merrimack County now, and I just want to say how proud I am of how sharp the contrast is between the red and green areas in Concord: https://en.wikipedia.org/wiki/File:Merrimack_County_population_density.png
(Bow is a bit of a problem, though)

Characterization of fiberwise bimeromorphism and specialization of bimeromorphic types I: the non-negative Kodaira dimension case
Jian Chen, Sheng Rao, I-Hsun Tsai
https://arxiv.org/abs/2506.12670

Characterization of fiberwise bimeromorphism and specialization of bimeromorphic types I: the non-negative Kodaira dimension case
Inspired by the recent works of M. Kontsevich--Y. Tschinkel and J. Nicaise--J. C. Ottem on specialization of birational types for smooth families (in the scheme category) and J. Koll{á}r's work on fiberwise bimeromorphism, we focus on characterizing the fiberwise bimeromorphism and utilizing the characterization to investigate the specialization of bimeromorphic types for non-smooth families in the complex analytic setting. We provide some criteria for a bimeromorphic map between two families …

The approach of cluster symmetry to Diophantine equations
Leizhen Bao, Fang Li
https://arxiv.org/abs/2508.02005 https://arxiv.org/pdf/2508.02005

The approach of cluster symmetry to Diophantine equations
This paper aims to use a cluster-theoretic approach to give a kind of Diophantine equation whose solutions can be obtained by starting from initial solutions through mutations. We establish a novel framework bridging cluster theory and Diophantine equations through the lens of cluster symmetry. On the one hand, we give the necessary and sufficient condition for Laurent polynomials to remain invariant under a given cluster symmetric map. On the other hand, we construct a discriminant algorithm…

wiki_science: Wikipedia Map of Science (2020)
A network of scientific fields, extracted from the English Wikipedia in early 2020. Nodes are wikipedia pages representing natural, formal, social and applied sciences, and two nodes are linked if the cosine similarity of the page content is above a threshold. See <http://www.s…

Texas GOP governor sues to remove Democratic leader amid election map fight
Governor Abbott filed his lawsuit as other top Republicans raised the prospect of legal challenges and intensifying law enforcement actions against Democrats.
Texas Attorney General Ken Paxton (R) threatened to go to court within days to remove Democrats from office”

Donald Trump claimed Republicans are “entitled” to redraw Texas’s maps to give themselves five more safe U.S. House seats.
Th…

Texas GOP governor sues to remove Democratic leader amid election map fight
Gov. Greg Abbott filed his lawsuit as other top Republicans raised the prospect of intensifying law enforcement actions against Democrats.

«Real-world map data is helping make better games about farms and transportation»
Interesting piece on how games use #OpenStreetMap data. No mention of how those games might accidentally incentivize vandalism to achieve game objectives though!
https://www.theverge.com/games/672035/openstreetmap-data-games

Damn, this ebike things is actually pretty cool. I did my normal ride in the cemetery without using the motor and my stats are pretty damn close to my acoustic rides.
I’m probably going to have a lot to say about it this week.
#biking #bikeTooter

Velvet Sundown, an AI‑created band with ~850,000 monthly Spotify listeners and two recent albums, shows how some listeners are turning to anodyne AI music (Ian Bogost/The Atlantic)

My Road Trip With the Velvet Sundown
“​​Rubber burns, the map fades away / Chasing the ghosts of yesterday.” Sure, fine.

«Real-world map data is helping make better games about farms and transportation»
Interesting piece on how games use #OpenStreetMap data. No mention of how those games might accidentally incentivize vandalism to achieve game objectives though!
https://www.theverge.com/games/672035/openstreetmap-data-games

fly_hemibrain: Fly hemibrain (2020)
A synaptic map of the hemibrain connectome of fruit fly Drosophila melanogaster. Nodes are neurons, and edges are synaptic connections, traced individually from brain image sections using EM reconstruction techniques. Neurons are labeled by their type. Edges are annotated by the connection strength between the neurons.
This network has 21739 nodes and 4259624 edges.
Tags: Biological, Connectome, Weighted, Metadata

Structure Fire
1200 Silvestre Road
in Hope Ranch,
#SantaBarbara

Beto O'Rourke's political group is a top funder for Texas Democrats' exodus to block GOP congressional map (Owen Dahlkamp/The Texas Tribune)
https://www.texastribune.org/2025/08/05/texas-democrats-quorum-break-beto-orourke-illinois-funding/
http://www.memeorandum.com/250806/p9#a250806p9

Today’s ride was tough but I got in 12 miles and saw a bird… I did see another large bird and a baby rabbit but didn’t get photos.
#biking #bikeTooter #mke

fly_hemibrain: Fly hemibrain (2020)
A synaptic map of the hemibrain connectome of fruit fly Drosophila melanogaster. Nodes are neurons, and edges are synaptic connections, traced individually from brain image sections using EM reconstruction techniques. Neurons are labeled by their type. Edges are annotated by the connection strength between the neurons.
This network has 21739 nodes and 4259624 edges.
Tags: Biological, Connectome, Weighted, Metadata

This https://arxiv.org/abs/2505.12364 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

On a Riemann-Roch formula for stacks with finite cyclotomic inertia
B. Toen defined a Riemann-Roch map from the rational algebraic K-theory of a tame Deligne-Mumford quotient stack to the étale K-theory of its inertia. He proved that this map is an isomorphism and that it is covariant with respect to proper maps. Moreover G. Vezzosi and A. Vistoli proved a decomposition theorem for the equivariant K-theory of a noetherian scheme. In this paper we give a geometric definition of the Vezzosi-Vistoli decomposition, interpreting the pieces as corresponding to the c…

Extremely hot day in the Netherlands again, especially in the South. In over a century of records until 2019, no station in the country had ever reached a temperature of 39°C.
Today was the third time the city of Maastricht saw it happen, and this was by far the earliest in summer for any station.
#heatwave