Tootfinder

ISW: Russian forces have seized 505 square kilometers since October offensive: https://benborges.xyz/2024/03/29/isw-russian-forces.html

Square Puzzler
#itchio #freegame

Rainy Day in New York City!
When it rains in Washington Square Park in Greenwich Village, the people disappear, and nature comes back to life!
Photos by our @…
#Photography #NewYork

A tool to roll a ball bearing with pressure against a cut surface to improve surface finish. Looks like a simple build, though here made maybe a little more complicated than it needed to be. I think I would turn a round end on square stock instead of brazing a square end on round stock. Goes on my list of tools to consider making some day...
https://

This https://arxiv.org/abs/2204.03136 has been replaced.
link: https://scholar.google.com/scholar?q=a

Simplicial Resolutions of Powers of Square-free Monomial Ideals
The Taylor resolution is almost never minimal for powers of monomial ideals, even in the square-free case. In this paper we introduce a smaller resolution for each power of any square-free monomial ideal, which depends only on the number of generators of the ideal. More precisely, for every pair of fixed integers $r$ and $q$, we construct a simplicial complex that supports a free resolution of the $r$-th power of any square-free monomial ideal with $q$ generators. The resulting resolution is si…

D674,835 - issued in 2013 for a design for "eyewear that includes a clock." #DesignPatents

urban_streets: Urban street networks (2017)
20 urban street networks, corresponding to 1-square-mile maps of 20 cities around the world.
This network has 488 nodes and 730 edges.
Tags: Transportation, Roads, Unweighted, Metadata
https://networks.skewed.de/net/urban_s

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…

Square patterns in dynamical orbits
Vefa Goksel, Giacomo Micheli
https://arxiv.org/abs/2403.19642 https://arxiv.org/pdf/2403.19642

Square patterns in dynamical orbits
Let $q$ be an odd prime power. Let $f\in \mathbb{F}_q[x]$ be a polynomial having degree at least $2$, $a\in \mathbb{F}_q$, and denote by $f^n$ the $n$-th iteration of $f$. Let $χ$ be the quadratic character of $\mathbb{F}_q$, and $\mathcal{O}_f(a)$ the forward orbit of $a$ under iteration by $f$. Suppose that the sequence $(χ(f^n(a)))_{n\geq 1}$ is periodic, and $m$ is its period. Assuming a mild and generic condition on $f$, we show that, up to a constant, $m$ can be bounded from below by $&…

Still a lot of cool utilitarian architecture all over LA. I love how the windows reflect the sunlight on this one.
#architecture #urbanphotography #losangeles

Recently, I read about venture capitalist #Marc #Andreessen putting his 12,000-square-foot mansion in Atherton, California, which has seven fireplaces,
up for sale for $33.75 million.
This was done to spend more time, one supposes, at the $177 million home he owns in Paradise Cove, California;
or the $…

My Dinner With Andreessen
Billionaires I have known: Part One of a three-part series

Ronna McDaniel Admits Joe Biden Won 'Fair and Square'
https://www.newsweek.com/ronna-mcdaniel-former-rnc-chair-admits-welker-biden-won-fair-square-over-trump-1882805

Ronna McDaniel Admits Joe Biden Won 'Fair and Square'
NBC News announced Friday that McDaniel was joining the network as a contributor, which has led to backlash on social media.

Fun fact, penguins have about 100 feathers per square inch. Seriously, you can look it up. You too can join in at Birds of a Feather Sessions at SCaLE 21x which is only a couple of short weeks away. Interested in hosting a BoF? Sign up today https://forms.gle/FRPybhTBRA4T8P3x6

A tool to roll a ball bearing with pressure against a cut surface to improve surface finish. Looks like a simple build, though here made maybe a little more complicated than it needed to be. I think I would turn a round end on square stock instead of brazing a square end on round stock. Goes on my list of tools to consider making some day...
https://

Emit Valentine 🪗
“Rabbit Stole A Pumpkin”
Centerville, Franklin County, North Carolina, USA – Collected by Thomas Carter in 1971
Southern Folklife Collection – Wilson Library, University of North Carolina at Chapel Hill
One of just a handful of recordings of African American #accordion from a lost tradition of Black square dance squeezebox that thrived from the 1860s to…

https://www.consumerreports.org/consumerist/dealerships-rip-you-off-with-the-four-square-heres-how-to-beat-it/

On the impossibility of certain $({n^2 n k}_{n 1})$ configurations
Jackson Philbrook, Benjamin Peet
https://arxiv.org/abs/2404.17514 https://

On the impossibility of certain $({n^2+n+k}_{n+1})$ configurations
This paper investigates the impossibility of certain $({n^2+n+k}_{n+1})$ configurations. Firstly, for $k=2$, the result of \cite{gropp1992non} that $\frac{n^2+n}{2}$ is even and $n+1$ is a perfect square or $\frac{n^2+n}{2}$ is odd and $n-1$ is a perfect square is reproved using the incidence matrix $N$ and analysing the form of $N^TN$. Then, for all $k$, configurations where paralellism is a transitive property are considered. It is then analogously established that if $n\equiv0$ or $n\equiv k…

27Al-NMR Study on a square-Kagome lattice antiferromagnet
Takayuki Goto, Masayoshi Fujihala, Setsuo Mitsuda
https://arxiv.org/abs/2402.18125 https://

27Al-NMR Study on a square-Kagome lattice antiferromagnet
NMR study has been performed on an S = 1/2 antiferromagnet KCu6AlBiO4(SO4)5Cl on the square-Kagome lattice, which has three slightly inequivalent nearest-neighbor interactions. Because of the geometrical frustration inherited from triangles within the square kagome lattice and of the low dimensionality, a long range magnetic order is strongly suppressed; its absence has so far been confirmed in low temperatures down to dilution refrigerator region. 27Al-NMR spectra and the longitudinal relaxati…

This https://arxiv.org/abs/2402.12898 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Explicit formula for the Benjamin--Ono equation with square integrable and real valued initial data and applications to the zero dispersion limit
In this paper, we extend G{é}rard's formula for the solution of the Benjamin--Ono equation on the line to square integrable and real valued initial data. Combined with this formula, we also extend the G{é}rard's formula for the zero dispersion limit of the Benjamin--Ono equation on the line to more singular initial data. In the derivation of the extension of the formula for the zero dispersion limit, we also find an interesting integral equality, which might be useful in other contexts.

This https://arxiv.org/abs/2310.11519 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

On some counterparts of Rickart $*$-algebras
In the present paper, we introduce and study counterparts of Rickart involutive algebras, i.e., almost inner Rickart algebras. We prove that a nilpotent associative algebra, which has no nilpotent elements with nonzero square roots, is an almost inner Rickart algebra. A nilpotent associative algebra, which has no nilpotent elements with a square root $b$ such that $b^3\neq 0$, is not an almost inner Rickart algebra if there exists a nonzero element $a$ such that $a^2\neq 0$. As a main result of…

The Rick Steves guide to life
When he’s not traveling around Europe, writing about Europe or running his multimillion dollar European tour company,
the prolific TV host and author likes to squeeze in some local activism.
The roundabout routine is his push to block off Edmonds’s very American Main Street for pedestrians.
If you squint at it, you can see what Steves sees:
this would be the perfect place for a lively town square.

The Rick Steves guide to life
Travel mogul. Philanthropist. Legal weed champion. The real Rick Steves is so much more complex than who you see on TV.

Ausgerollt: Überwachungsroboter K-5 patrouilliert nicht mehr am Times Square
Ein K-5-Überwachungsroboter sollte am Times Square für mehr Sicherheit sorgen. Doch er funktionierte nicht wie erwartet und wurde außer Dienst gestellt.
<…

Altered grid-like coding in early blind people https://www.nature.com/articles/s41467-024-47747-x Early blind people have a square grid map instead of a hexagonal grid map for navigation in their entorhinal cortex;

Altered grid-like coding in early blind people - Nature Communications
The contribution of visual experience to the formation of cognitive maps in humans is not well understood. Here, the authors show using fMRI and an imagined navigation paradigm, that sighted people display hexagonal grid-like neural coding, while blind people show neural representations consistent with a square grid.

Hey #androidDev and #iosDev friends: want to work with some of the most interesting people at Square?

Staff Android Software Engineer, Mobile Observability
Company Description: Since we opened our doors in 2009, the world of commerce has evolved immensely, and so has Square. After enabling anyone to take payments and never miss a sale, we saw sellers stymied by disparate, outmoded products and tools that wouldn’t work together. So we expanded into software and started building integrated, omnichannel solutions – to help sellers sell online, manage inventory, offer buy now, pay later functionality through Afterpay, book appointments, engage …

2021 retro-link! https://mattferraro.dev/posts/caustics-engineering - Hiding images in plain sight: an acrylic magic window that can project a picture.

This https://arxiv.org/abs/2401.07523 has been replaced.
link: https://scholar.google.com/scholar?q=a

Resonant amplification of curvature perturbations in inflation model with periodical derivative coupling
In this paper, we introduce a weak, transient and periodical derivative coupling between the inflaton field and gravity, and find that the square of the sound speed of the curvature perturbations becomes a periodic function, which results in that the equation of the curvature perturbations can be transformed into the form of the Mathieu equation in the sub-horizon limit. Thus, the parametric resonance will amplify the curvature perturbations so as to generate a formation of abundant primordial …

Statistical relations between spectropolarimetric observables and the polar strength of the stellar dipolar magnetic field
O. Kochukhov
https://arxiv.org/abs/2404.17517

Statistical relations between spectropolarimetric observables and the polar strength of the stellar dipolar magnetic field
Global magnetic fields of early-type stars are commonly characterised by the mean longitudinal magnetic field $\langle B_{\rm z} \rangle$ and the mean field modulus $\langle B \rangle$, derived from the circular polarisation and intensity spectra, respectively. Observational studies often report a root mean square (rms) of $\langle B_{\rm z} \rangle$ and an average value of $\langle B \rangle$. In this work, I used numerical simulations to establish statistical relationships between these cumul…

This https://arxiv.org/abs/2312.06349 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_ees…

DoA-Aided MMSE Channel Estimation for Wireless Communication Systems
This paper investigates the combination of parametric channel estimation with minimum mean square error (MMSE) estimation. We propose a direction-of-arrival (DoA)-aided two-stage channel estimation technique that utilizes the decomposition of wireless communication channels into a line-of-sight (LoS) path and its orthogonal subspace. After estimating the channel along the dominant direction, we utilize a Gaussian mixture model to estimate the conditionally Gaussian distributed random vector, wh…

alright #nyc heads: the next #psychedelic sangha/bardo bath is friday, may 3rd at judson church on washington square park, feat. garcia peoples, earthless's isaiah mitchell, erik davis, kendraplex, chris dingman, the return of bubba on lights, me, & more, celebrating erik's new book from MIT (…

5/3 - BLOTTER BATH by Psychedelic Sangha
Get tickets and support Psychedelic Sangha by becoming a member

Science has taken me many places but I have to admit I wasn't expecting the Festung Hohensalzburg
#Salzburg #photography #castle

This https://arxiv.org/abs/2402.04944 has been replaced.
link: https://scholar.google.com/scholar?q=a

Elastic Analysis of Augmented Curves and Constrained Surfaces
The square root velocity transformation is crucial for efficiently employing the elastic approach in functional and shape data analysis of curves. We study fundamental geometric properties of curves under this transformation. Moreover, utilizing natural geometric constructions, we employ the approach for intrinsic comparison within several classes of surfaces and augmented curves, which arise in the real world applications such as tubes, ruled surfaces spherical strips, protein molecules and hu…

urban_streets: Urban street networks (2017)
20 urban street networks, corresponding to 1-square-mile maps of 20 cities around the world.
This network has 32 nodes and 36 edges.
Tags: Transportation, Roads, Unweighted, Metadata
https://networks.skewed.de/net/urban_s

Oh hello, apparently that fucking robot police dog is in Assembly Square. https://www.facebook.com/share/r/PQAdWSGs7TXfSeXP/?mibextid=Rz46X9

1. Farting joins breakdancing as an Olympic sport.
2. America sends its best farters.
3. Donald Trump wins gold in Cortina d'Ampezzo, the first time he's ever won any sport fair and square.

Three YDS professors among the plenary speakers for the conference taking place April 7-9 on the spiritual and moral issues at stake in the 2024 presidential election: Rev. William Barber, Professor in the Practice of Public Theology and Public Policy; Dean Greg Sterling, Lillian Claus Professor of New Testament; and Dr. Willie James Jennings, Associate Professor of Systematic Theology and Africana Studies.
See the rest of the plenary speakers lineup here:

Speakers — Public Theology & Public Policy Conference

Oh! I can render at 1920 square, and then crop to 1080 for each orientation.
That's a 1/4 or so longer render time for each image vs rendering straight into 16x9 but way way faster than doing 16x9 and then 9x16.
🤔 Yes. Good plan I think.

Sauntering about the neighborhood on this rather beautiful, sunny, and quiet Friday. There's a week-long arts and crafts bazaar at the nearby square. Curiously, lots of Italian vendors, judging by the speech you could hear passing by the stalls. It's kind of a recurring thing of late. Usually in the evenings, the streets are filled with foreign families, kids and all, of various European descent. If feels so much better compared to my vague memories from before the fall of the Iron …

On live TV, Guardian Angels rough up a man in Times Square then misidentify him as a 'migrant' (Jake Offenhartz/Associated Press)
https://apnews.com/article/guardian-angels-times-square-migrants-curtis-sliwa-da…

Guardian Angels rough up man in Times Square then misidentify him as a 'migrant'
Members of the Guardian Angels roughed up a man they’d misidentified as a “migrant” during a live interview on Fox News Tuesday night. The altercation came as the Guardian Angels founder was speaking to Sean Hannity from Times Square. Members of the Guardian Angels could be seen pushing a man to the ground and putting him in a headlock following a disturbance off-screen. A police spokesperson says the man was a resident of the Bronx despite the group's leader claiming he was a migrant sho…

baltimore bridge collapse, mass casualty
one million, two hundred ninety eight thousand cyclists weighing 90kg. (the population of Dallas)
half a freight train
going smack dab into a support column of a bridge
https://www.vesselfinder.com/vessels/details/9697428
maritime accidents are an order of magnitude... geez
...
on the smaller scale, I'd love more cyclists and less pickup trucks.
on the larger scale, I'd love more freight trains and less tractor trailers.
<.< >.> I dunno how I square that circle.
it's not necessarily less capitalist as much as... less idiots driving, more people scale movement, and more efficient movement of stuff too big.

This https://arxiv.org/abs/2404.06536 has been replaced.
initial toot: https://mastoxiv.page/@…

Exact Floquet flat band and heating suppression via two-rate drive protocols
We demonstrate the existence of exact Floquet flat bands implying strong violation of the eigenstate thermalization hypothesis in a large class of closed quantum many-body systems in the presence of a two-rate drive characterized by frequencies $Ω_1$ and $Ω_2=νΩ_1$. We provide the exact analytic condition for this phenomenon to occur for a generic protocol; in particular, $ν=(2p+1)$, where $p$ is an integer, leads to such flat bands for both square-pulse and cosine drive protocols for arbi…

This https://arxiv.org/abs/2401.10152 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Sums of square roots that are close to an integer
Let $k \in \mathbb{N}$ and suppose we are given $k$ integers $1 \leq a_1, \dots, a_k \leq n$. If $\sqrt{a_1} + \dots + \sqrt{a_k}$ is not an integer, how close can it be to one? When $k=1$, the distance to the nearest integer is $\gtrsim n^{-1/2}$. Angluin-Eisenstat observed the bound $\gtrsim n^{-3/2}$ when $k=2$. We prove there is a universal $c>0$ such that, for all $k \geq 2$, there exists a $c_k > 0$ and $k$ integers in $\left\{1,2,\dots, n\right\}$ with $$ 0 <\|\sqrt{a_1} + \dots + \…

This https://arxiv.org/abs/2211.06755 has been replaced.
link: https://scholar.google.com/scholar?q=a

The chiPower transformation: a valid alternative to logratio transformations in compositional data analysis
The approach to analysing compositional data has been dominated by the use of logratio transformations, to ensure exact subcompositional coherence and, in some situations, exact isometry as well. A problem with this approach is that data zeros, found in most applications, have to be replaced to allow the logarithmic transformation. An alternative new approach, called the `chiPower' transformation, which allows data zeros, is to combine the standardization inherent in the chi-square distance in …

"Deforestation alerts in the Brazilian Amazon fall to a 5-year low"
#Brazil #Trees #Deforestation

Deforestation alerts in the Brazilian Amazon fall to a 5-year low
Forest clearing detected by Brazil’s deforestation alert system fell to the lowest level in nearly five years, according to data released last week by the country’s space agency, INPE. INPE’s satellite-based tracking system recorded deforestation of 162 square kilometers in March, bringing the total loss over the past twelve months to 4,816 square kilometers, the […]

This https://arxiv.org/abs/2304.02661 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Deep learning approach for identification of HII regions during reionization in 21-cm observations -- II. foreground contamination
The upcoming Square Kilometre Array Observatory (SKAO) will produce images of neutral hydrogen distribution during the epoch of reionization by observing the corresponding 21-cm signal. However, the 21-cm signal will be subject to instrumental limitations such as noise and galactic foreground contamination which pose a challenge for accurate detection. In this study, we present the SegU-Net v2 framework, an enhanced version of our convolutional neural network, built to identify neutral and ioni…

Normal approximations of commuting square-summable matrix families
Alexandru Chirvasitu
https://arxiv.org/abs/2402.16559 https://arxi…

Normal approximations of commuting square-summable matrix families
For any square-summable commuting family $(A_i)_{i\in I}$ of complex $n\times n$ matrices there is a normal commuting family $(B_i)_i$ no farther from it, in squared normalized $\ell^2$ distance, than the diameter of the numerical range of $\sum_i A_i^* A_i$. Specializing in one direction (limiting case of the inequality for finite $I$) this recovers a result of M. Fraas: if $\sum_{i=1}^{\ell} A_i^* A_i$ is scalar for commuting $A_i\in M_n(\mathbb{C})$ then the $A_i$ are normal; specializing in…

Exact equilibrium properties of square-well and square-shoulder disks in single-file confinement
Ana M. Montero, Andr\'es Santos
https://arxiv.org/abs/2402.15192

Exact equilibrium properties of square-well and square-shoulder disks in single-file confinement
This study investigates the (longitudinal) thermodynamic and structural characteristics of single-file confined square-well and square-shoulder disks by employing a mapping technique that transforms the original system into a one-dimensional polydisperse mixture of nonadditive rods. Leveraging standard statistical-mechanical techniques, exact results are derived for key properties, including the equation of state, internal energy, radial distribution function, and structure factor. The asymptot…

This https://arxiv.org/abs/2306.15867 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Convergence analysis of a weak Galerkin finite element method on a Shishkin mesh for a singularly perturbed fourth-order problem in 2D
We consider the singularly perturbed fourth-order boundary value problem $\varepsilon ^{2}Δ^{2}u-Δu=f $ on the unit square $Ω\subset \mathbb{R}^2$, with boundary conditions $u = \partial u / \partial n = 0$ on $\partial Ω$, where $\varepsilon \in (0, 1)$ is a small parameter. The problem is solved numerically by means of a weak Galerkin(WG) finite element method, which is highly robust and flexible in the element construction by using discontinuous piecewise polynomials on finite element pa…

Rectangulotopes
Jean Cardinal, Vincent Pilaud
https://arxiv.org/abs/2404.17349 https://arxiv.org/pdf/2404.17349

Rectangulotopes
Rectangulations are decompositions of a square into finitely many axis-aligned rectangles. We describe realizations of (n-1)-dimensional polytopes associated with two combinatorial families of rectangulations composed of n rectangles. They are defined as quotientopes of natural lattice congruences on the weak Bruhat order on permutations in S_n, and their skeleta are flip graphs on rectangulations. We give simple vertex and facet descriptions of these polytopes, in particular elementary formula…

This https://arxiv.org/abs/2307.10147 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Tangling schedules eases hardware connectivity requirements for quantum error correction
Quantum computers have the potential to change the way we solve computational problems. Due to the noisy nature of qubits, the need arises to correct physical errors occurring during computation. The surface code is a promising candidate for such error correction that shows high threshold and which can store a logical quantum state on hardware with square-grid connectivity, a type of device that already exists. However, for logical quantum computation, the measurement of some irregular, non-loc…

Block says it has finished the development of its own 3nm bitcoin mining chip and is working through the design with a "leading global semiconductor foundry" (MacKenzie Sigalos/CNBC)
https://www.cnbc.com/2024/04/23/block-form

Tracts of desert land are sold cheaply in 5- or 10-acre allotments. People dreaming of creating a life far from the modern world tend to build cheap/quick boxes on them - a tiny square on a larger square in a desolate landscape, just the way they dreamed it. But desert life is hard, and it seldom works out. Driving through Wonder Valley, I spotted more abandoned homesteader shacks than occupied ones, and pulled over to record the ones I could.
Wonder Valley Homesteader Shack #1
…<…

Multilinear Commutators of Multilinear Square Operators Associated with New $BMO$ Functions and New Weight Functions
Chunliang Li, Shuhui Yang, Yan Lin
https://arxiv.org/abs/2402.15766

Multilinear Commutators of Multilinear Square Operators Associated with New $BMO$ Functions and New Weight Functions
Via the new weight $A_{\vec p}^{\infty}(φ)$ and the new $BMO$ function, the authors introduce a new class of multilinear square operators $T$ with generalized kernels. The boundedness of multilinear commutators and multilinear iterative commutators generated by $T$ and the new $BMO$ function on weighted Lebesgue spaces and weighted Morrey spaces is obtained, respectively. The results of this article contain some known conclusions.

This https://arxiv.org/abs/2208.09380 has been replaced.
link: https://scholar.google.com/scholar?q=a

On compactness of weak square at singulars of uncountable cofinality
Cummings, Foreman, and Magidor proved that Jensen's square principle is non-compact at $\aleph_ω$, meaning that it is consistent that $\square_{\aleph_n}$ holds for all $n<ω$ while $\square_{\aleph_ω}$ fails. We investigate the natural question of whether this phenomenon generalizes to singulars of uncountable cofinality. Surprisingly, we show that under some mild hypotheses, the weak square principle $\square_κ^*$ is in fact compact at singulars of uncountable cofinality, and that an even …

Had a lot of fun browsing these alternative macOS icon designs with more inventive uses of the containing square, collected by @… 👀 https://blog.jim-nielsen.com/2024…

🎨 teamLab Saga: Immersive Art in a Lush, Ancient Forest
https://www.tokyoweekender.com/art_and_culture/arts/teamlab-saga-kyushu-mifyuneyama-rakuen-park/

teamLab Saga: Immersive Art in a Lush, Ancient Forest
The art collective has installed a number of stunning exhibitions in the 500,000-square-meter Mifune Rakuen Gardens.

A question stoners think about when high AF.
Why are Pizza boxes square when the Pizzas are round and slices are triangles?

Alexander Pruss's Blog || Simplicity and Newton's inverse square law
http://alexanderpruss.blogspot.com/2024/03/simplicity-and-newtons-inverse-square.html

Solving Time-Continuous Stochastic Optimal Control Problems: Algorithm Design and Convergence Analysis of Actor-Critic Flow
Mo Zhou, Jianfeng Lu
https://arxiv.org/abs/2402.17208 <…

Solving Time-Continuous Stochastic Optimal Control Problems: Algorithm Design and Convergence Analysis of Actor-Critic Flow
We propose an actor-critic framework to solve the time-continuous stochastic optimal control problem. A least square temporal difference method is applied to compute the value function for the critic. The policy gradient method is implemented as policy improvement for the actor. Our key contribution lies in establishing the global convergence property of our proposed actor-critic flow, demonstrating a linear rate of convergence. Theoretical findings are further validated through numerical examp…

Allowing dignity in death to someone who has lived overseas for some time, but maintained close ties to family in WA is the right choice.
Everyone deserves dignity and respect at end of life.
Article here: https://www.abc.net.au/news/2024-04-24/is…

Can you still access voluntary assisted dying laws if you've been living elsewhere for a decade or more?
Can you still be a Western Australian resident and access the state's voluntary euthanasia process if you've spent most of the past 15 years living in Bali? The answer might surprise you.

Would you look at that! The cops got caught lying again, because lying is what cops do when they're not busy killing or beating the shit out of people. #acab #nyc

New Videos Contradict NYPD Account of Lead-Up to Times Square Attack on Cops
Police said Yohenry Brito was disobeying a lawful order to disperse when an officer tried to arrest him, triggering a melee with nearly a dozen men. But footage released today shows he was walking away.

Putin holds rally on Red Square following elections, promises to continue the war: https://benborges.xyz/2024/03/18/putin-holds-rally.html

Fibers of the square map in some finite groups of Lie type and an application
Saikat Panja
https://arxiv.org/abs/2403.17096 https://a…

Fibers of the square map in some finite groups of Lie type and an application
Let $G$ be one of the finite general linear, unitary, symplectic or orthogonal groups over finite fields of odd order. We find the cardinality of the fibers of the square map at a given generic element. Using this we find the number of real conjugacy classes of $G$. This is primarily achieved by leveraging a recent solution to Brauer's problem 14.

OTD in 2022, #PutinWarCriminal invaded Ukraine for the second time. Despite the imbalance of respective forces, Ukrainian soldiers fought like lions and kept ruZZia from taking Kyiv.
If you care about your children, or even about yourself, don't let this happen, help Ukraine. Write to your representatives, send money, protest in the streets, side with Ukraine!
Ukraine paid …

This https://arxiv.org/abs/2310.01731 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Phase transition and universality in the majority-rule model with social noises on various network topologies
This paper explores the impact of social noise, characterized by either independence or anticonformity, on order-disorder phase transitions within the majority-rule model framework. The study spans diverse network topologies, including the complete graph, two-dimensional (2-D) square lattice, three-dimensional (3-D) square lattice, and heterogeneous networks such as Watts-Strogatz, Barabási-Albert, and Erdős-Renyi networks. The social noise is represented by the fundamental parameter $p$, den…

Spectral properties of two-dimensional half-space semi-Dirac semi-metals
Tuyen Vu
https://arxiv.org/abs/2402.17610 https://arxiv.org/…

Spectral properties of two-dimensional half-space semi-Dirac semi-metals
The paper deals with the semi-Dirac operator in a half-space arising in the description of quasiparticles in quantum mechanics as well as in semi-metals materials and related structures. It completely shows the self-adjointness, computes the square and the spectrum of the operator. We also set up sufficient conditions for the existence of the point and discrete spectrum by including some appropriate potentials in the problem and study the spectral stability properties for perturbed operators.

Batch Estimation of a Steady, Uniform, Flow-Field from Ground Velocity and Heading Measurements
Artur Wolek, James McMahon
https://arxiv.org/abs/2402.17078

Batch Estimation of a Steady, Uniform, Flow-Field from Ground Velocity and Heading Measurements
This paper presents three batch estimation methods that use noisy ground velocity and heading measurements from a vehicle executing a circular orbit (or similar large heading change maneuver) to estimate the speed and direction of a steady, uniform, flow-field. The methods are based on a simple kinematic model of the vehicle's motion and use curve-fitting or nonlinear least-square optimization. A Monte Carlo simulation with randomized flow conditions is used to evaluate the batch estimation met…

#Photography #FiltersGoneWild #ArchitectureyCrap #SanFranciscoHellscape

This https://arxiv.org/abs/2311.00656 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_ees…

Online Signal Estimation on the Graph Edges via Line Graph Transformation
The processing of signals on graph edges is challenging considering that Graph Signal Processing techniques are defined only on the graph nodes. Leveraging the Line Graph to transform a graph edge signal onto the node of its edge-to-vertex dual, we propose the Line Graph Least Mean Square (LGLMS) algorithm for online time-varying graph edge signal prediction. By setting up an $l_2$-norm optimization problem, LGLMS forms an adaptive algorithm as the graph edge analogy of the classical adaptive L…

This https://arxiv.org/abs/2309.02568 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Multiplicities in the length spectrum and growth rate of Salem numbers
We prove that mean multiplicities in the length spectrum of a non-compact arithmetic hyperbolic orbifold of dimension $n \ge 4$ have exponential growth rate $$ \langle g(L) \rangle \geqslant c \frac{e^{([n/2] - 1)L}}{L^{1 + δ_{5, 7}(n) }}, $$ extending the analogous result for even dimensions of Belolipetsky, Lalín, Murillo and Thompson. Our proof is based on the study of (square-rootable) Salem numbers. As a counterpart, we also prove an asymptotic formula for the distribution of square-ro…

In honor of Chinese New Year, SFMTA is offering free parking in the Portsmouth Square garage all month, but free Muni only for the day of the parade, February 24th. Our mayor apparently believes transit riders do not buy things
Anyway, your favorite single-purpose website https://ismunifree.com is now updated with th…

Is Muni Free?

#testing 1 2 3
https://www.earth.org.uk/note-on-site-technicals-81.html#2024-02-24

On Website Technicals (2024-02)
Tech updates: intensity page tweak, new data source and JSON, toot lite, significantLink, square gCO2perkWh, series RSS, Mastodon preview a11y alt text...

This https://arxiv.org/abs/2310.02306 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Collective Thomson scattering in magnetized electron and positron pair plasma and the application to induced Compton scattering
We consider collective Thomson scattering of an incident X-mode wave (with the electric vector perpendicular to the background magnetic field) in magnetized electron and positron pair plasma. The collective effects do not exactly cancel out in contrast to the non-magnetized case. Still, the cross-section is comparable to the non-collective one, with the same suppression by the square of the cyclotron frequency in a strong magnetic field. The comparable cross-section holds even though the net cu…

This https://arxiv.org/abs/2401.10930 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Class numbers, Ono invariants and some interesting primes
The main purpose of this paper is to find all the prime numbers p for which whenever we add to p an odd square less than p we obtain a number which has at most two different prime factors. We solve completely the cases $p\equiv 1,3,5 \pmod 8$. The idea of the proof in these cases is to find the class number for the quadratic imaginary field $\mathbb{Q}(i\sqrt p)$. Since we know all these quadratic imaginary fields with class number 1, 2 or 4, we are able to solve these cases. The most interesti…

A lot of pizza places have Pi-Day "special price" of $3.14, but many are still a raw deal, and even AI gets it.
Example:
BJ's Restaurants Pi-Day only: $3.14 single-topping 9" pizza
Costco food court any day: $9.99 multi-topping 18" pizza, with way better ingredients
PS:
- You don't need to eat all the pizza at once. It freezes just fine.
- Healthier not to eat (traditional) pizza at all, but if you wanna.

On the best constants in Khintchine type inequalities for martingales
Grigori A. Karagulyan
https://arXiv.org/abs/2401.16153 https://…

On the best constants in Khintchine type inequalities for martingales
For discrete martingale-difference sequences $d=\{d_1,\ldots,d_n\}$ we consider Khintchine type inequalities, involving certain square function $\mathfrak S (d)$ considered by Chang-Wilson-Wolff in 1982. In particular, we prove \begin{equation} \left\|\sum_{k=1}^nd_k\right\|_p\le 2^{1/2}\big(Γ((p+1)/2))/\sqrtπ\big)^{1/p}\|\mathfrak S(d)\|_\infty,\quad p\ge 3, \end{equation} where the constant on the right hand side is the best possible and the same as known for the…

This https://arxiv.org/abs/2310.11816 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_nuc…

Modeling alpha-nucleus elastic scattering using a velocity-dependent optical model
We performed a least-square fit analysis to reproduce the elastic angular distributions for $α$ scattering on various nuclei form $^{12}$C to $^{208}$Pb for incident energies in the range 18 - 70 MeV using a velocity-dependent optical model. The model reproduced the experimental data well including the enhanced angular distributions in the large-angle scattering region, which is commonly known as the anomalous large angle scattering (ALAS). Our best-fit potential parameters are linear function…

"I love the smell of square waves in the morning"
#Wagner

This https://arxiv.org/abs/2311.05209 has been replaced.
initial toot: https://mastoxiv.page/@arX…

High-frequency dielectric anomalies in a highly frustrated square kagome lattice nabokoite family compounds ACu$_7$(TeO$_4$)(SO$_4$)$_5$Cl (A=Na, K, Rb, Cs)
Nabokoite family compounds ACu$_7$(TeO$_4$)(SO$_4$)$_5$Cl (A=Na, K, Cs, Rb) are candidates for the experimental realization of highly-frustrated 2D square kagome lattice (SKL). Their magnetic subsystem includes SKL layers decorated by additional copper ions. All members of this family are characterized by quite high Curie-Weiss temperatures ($\sim 80-200$ K), but magnetic ordering was reported only for Na and K compounds at a much lower temperatures below 4 K. We report here results of the stud…

This https://arxiv.org/abs/2403.01138 has been replaced.
link: https://scholar.google.com/scholar?q=a

First eigenvalue characterization of Clifford hypersurfaces and Veronese surface
We give an estimate for the first eigenvalue of the Schrödinger operator $L:=-Δ-σ$ which is defined on the closed minimal submanifold $M^{n}$ in the unit sphere $\mathbb{S}^{n+m}$, where $σ$ is the square norm of the second fundamental form.

Sauntering about the neighborhood on this rather beautiful, sunny, and quiet Friday. There's a week-long arts and crafts bazaar at the nearby square. Curiously, lots of Italian vendors, judging by the speech you could hear passing by the stalls. It's kind of a recurring thing of late. Usually in the evenings, the streets are filled with foreign families, kids and all, of various European descent. If feels so much better compared to my vague memories from before the fall of the Iron …

"Deforestation alerts in the Brazilian Amazon fall to a 5-year low"
#Brazil #Trees #Deforestation

Deforestation alerts in the Brazilian Amazon fall to a 5-year low
Forest clearing detected by Brazil’s deforestation alert system fell to the lowest level in nearly five years, according to data released last week by the country’s space agency, INPE. INPE’s satellite-based tracking system recorded deforestation of 162 square kilometers in March, bringing the total loss over the past twelve months to 4,816 square kilometers, the […]

Exact equilibrium properties of square-well and square-shoulder disks in single-file confinement
Ana M. Montero, Andr\'es Santos
https://arxiv.org/abs/2402.15192

Exact equilibrium properties of square-well and square-shoulder disks in single-file confinement
This study investigates the (longitudinal) thermodynamic and structural characteristics of single-file confined square-well and square-shoulder disks by employing a mapping technique that transforms the original system into a one-dimensional polydisperse mixture of nonadditive rods. Leveraging standard statistical-mechanical techniques, exact results are derived for key properties, including the equation of state, internal energy, radial distribution function, and structure factor. The asymptot…

Rational Diophantine sextuples with strong pair
Andrej Dujella, Matija Kazalicki, Vinko Petri\v{c}evi\'c
https://arxiv.org/abs/2403.17959 https://

Rational Diophantine sextuples with strong pair
A set of $m$ distinct nonzero rationals $\{a_1, a_2,\ldots, a_m\}$ such that $a_i a_j+1$ is a perfect square for all $1\le i

Local smoothing for the Hermite wave equation
Robert Schippa
https://arxiv.org/abs/2403.19108 https://arxiv.org/pdf/2403.19108…

Local smoothing for the Hermite wave equation
We show local smoothing estimates in $L^p$-spaces for solutions to the Hermite wave equation. For this purpose, we obtain a parametrix given by a Fourier Integral Operator, which we linearize. This leads us to analyze local smoothing estimates for solutions to Klein-Gordon equations. We show $\ell^2$-decoupling estimates adapted to the mass parameter to obtain local smoothing with essentially sharp derivative loss. In one dimension as consequence of square function estimates, we obtain estimate…

A Novel Geometric Solution for Moving Target Localization through Multistatic Sensing in the ISAC System
S. Zhuge, Y. Ma, Z. Lin, Y. Zeng
https://arXiv.org/abs/2401.15955

A Novel Geometric Solution for Moving Target Localization through Multistatic Sensing in the ISAC System
This paper proposes a novel geometric solution for tracking a moving target through multistatic sensing. In contrast to existing two-step weighted least square (2SWLS) methods which use the bistatic range (BR) and bistatic range rate (BRR) measurements, the proposed method incorporates an additional direction of arrival (DOA) measurement of the target obtained from a communication receiver in an integrated sensing and communication (ISAC) system. Unlike the existing 2SWLS methods that require a…

Gaza’s 37m tonnes of bomb-filled debris could take 14 years to clear, says expert
Israel’s war in Gaza has created 37m tonnes of debris, much of it laced with unexploded bombs, which could take more than a decade to remove, a top UN demining official said.
Nearly seven months into the war, there is an average 300kg of rubble a square metre of land in Gaza, Pehr Lodhammar, the former United Nationals Mine Action Service chief for Iraq, told a news conference.
“Based on the cur…

Block reports Q4 revenue up 24% YoY to $5.77B, Square profit up 18% YoY, Cash App profit up 25% YoY, and forecasts Q1 adjusted EBITDA above est.; SQ jumps 12% (Hannah Lang/Reuters)
https://www.reuters.com/technology/payment

This https://arxiv.org/abs/2105.07422 has been replaced.
link: https://scholar.google.com/scholar?q=a

More than 60% of zeros of Dirichlet $L$-functions are on the critical line
In this paper, we estimate the proportion of zeros of Dirichlet $L$-functions on the critical line. Using Feng's mollifier and an asymptotic formula for the mean square of Dirichlet $L$-functions, we prove that averaged over primitive characters and conductors, at least 61.07 % of zeros of Dirichlet $L$-functions are on the critical line, and at least 60.44 % of zeros are simple and on the critical line. These results improve the work of Conrey, Iwaniec and Soundararajan.

Cat Kings Of New York!
They rule the streets with an iron paw!
#AI #AIart #Midjourney #Cats

Allowing dignity in death to someone who has lived overseas for some time, but maintained close ties to family in WA is the right choice.
Everyone deserves dignity and respect at end of life.
Article here: https://www.abc.net.au/news/2024-04-24/is…

Can you still access voluntary assisted dying laws if you've been living elsewhere for a decade or more?
Can you still be a Western Australian resident and access the state's voluntary euthanasia process if you've spent most of the past 15 years living in Bali? The answer might surprise you.

Beijing is to Tiananmen Square as . . .

This https://arxiv.org/abs/2403.06708 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Tikhonov Regularization for Stochastic Non-Smooth Convex Optimization in Hilbert Spaces
To solve non-smooth convex optimization problems with a noisy gradient input, we analyze the global behavior of subgradient-like flows under stochastic errors. The objective function is composite, being equal to the sum of two convex functions, one being differentiable and the other potentially non-smooth. We then use stochastic differential inclusions where the drift term is minus the subgradient of the objective function, and the diffusion term is either bounded or square-integrable. In this …

This https://arxiv.org/abs/2312.07967 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Massey products in Galois cohomology and Pythagorean fields
We prove that a strengthened version of Minac-Tan's Massey Vanishing Conjecture holds true for fields with a finite number of square classes whose maximal pro-$2$ Galois group is of elementary type (as defined by I. Efrat). In particular, this proves Minac-Tan's Massey Vanishing Conjecture for Pythagorean fields with a finite number of square classes and their finite extensions.

"I love the smell of square waves in the morning"
#Wagner

This https://arxiv.org/abs/2305.19965 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

A clustering theorem in fractional Sobolev spaces
We prove a general clustering result for the fractional Sobolev space $W^{s,p}$: whenever the positivity set of a function $u$ in a square has measure bounded from below by a multiple of the cube's volume, and the $W^{s,p}$-seminorm of $u$ is bounded from above by a convenient power of the cube's side, then $u$ is positive in a universally reduced cube. Our result aims at applications in regularity theory for fractional elliptic and parabolic equations. Also, by means of suitable interpolation …

This https://arxiv.org/abs/2402.14141 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Quantum state preparation of topological chiral spin liquids via Floquet engineering
In condensed matter, Chiral Spin Liquids (CSL) are quantum spin analogs of electronic Fractional Quantum Hall states (in the continuum) or Fractional Chern Insulators (on the lattice). As the latter, CSL are remarquable states of matter, exhibiting topological order and chiral edge modes. Preparing CSL on quantum simulators like cold atom platforms is still an open challenge. Here we propose a simple setup on a finite cluster of spin-1/2 located at the sites of a square lattice. Using a Resonat…

This https://arxiv.org/abs/2403.06708 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Tikhonov Regularization for Stochastic Non-Smooth Convex Optimization in Hilbert Spaces
To solve non-smooth convex optimization problems with a noisy gradient input, we analyze the global behavior of subgradient-like flows under stochastic errors. The objective function is composite, being equal to the sum of two convex functions, one being differentiable and the other potentially non-smooth. We then use stochastic differential inclusions where the drift term is minus the subgradient of the objective function, and the diffusion term is either bounded or square-integrable. In this …

This https://arxiv.org/abs/2307.07613 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Phases and Exotic Phase Transitions of a Two-Dimensional Su-Schrieffer-Heeger Model
We study a Su-Schrieffer-Heeger electron-phonon model on a square lattice by means of auxiliary-field quantum Monte Carlo simulations. The addition of a symmetry-allowed interaction permits analytical integration over the phonons at the expense of discrete Hubbard-Stratonovich fields with imaginary-time correlations. Using single-spin-flip updates, we investigate the phase diagram at the O(4)-symmetric point as a function of hopping $t$ and phonon frequency $ω_0$. For $t=0$, where electron hop…

New and old Saito-Kurokawa lifts classically via $L^2$ norms and bounds on their supnorms: level aspect
Pramath Anamby, Soumya Das
https://arxiv.org/abs/2403.17401

New and old Saito-Kurokawa lifts classically via $L^2$ norms and bounds on their supnorms: level aspect
In the first half of the paper, we lay down a classical approach to the study of Saito-Kurokawa (SK) lifts of (Hecke congruence) square-free level, including the allied new-oldform theory. Our treatment of this relies on a novel idea of computing ranks of certain matrices whose entries are $L^2$-norms of eigenforms. For computing the $L^2$ norms we work with the Hecke algebra of $\mathrm{GSp}(2)$. In the second half, we formulate precise conjectures on the $L^\infty$ size of the space of SK l…

A modular framework of generalized Hurwitz class numbers
Olivia Beckwith, Andreas Mono
https://arxiv.org/abs/2403.17829 https://arxiv…

A modular framework of generalized Hurwitz class numbers
We discover a non-trivial rather simple relation between the mock modular generating functions of the level $1$ and level $N$ Hurwitz class numbers. This relation yields a holomorphic modular form of weight $\frac{3}{2}$ and level $4N$, where $N > 1$ is stipulated to be odd and square-free. We extend this observation to a non-holomorphic framework and obtain a higher level non-holomorphic Zagier Eisenstein series as well as a higher level preimage of it under the Bruinier--Funke operator $ξ_{\…