Tootfinder

The Arrow-Hurwicz iteration for virtual element discretizations of the incompressible Navier-Stokes equations
Binbin Du, Shenxiang Cheng, Yue Yu, Chuanjun Chen
https://arxiv.org/abs/2507.12036

The Arrow-Hurwicz iteration for virtual element discretizations of the incompressible Navier-Stokes equations
This article presents a detailed analysis of the Arrow-Hurwicz iteration applied to the solution of the incompressible Navier-Stokes equations, discretized by a divergence-free mixed virtual element method. Under a set of appropriate assumptions, it is rigorously demonstrated that the method exhibits geometric convergence, with a contraction factor that remains independent of the mesh sizes. A series of numerical experiments are conducted to validate the theoretical findings and to assess the c…

🇺🇦 #NowPlaying on KEXP's #Roadhouse
Harry Nilsson:
🎵 Me and My Arrow
#HarryNilsson
https://wetbridgerecords.bandcamp.com/album/ty-segall-loch-lomond-gotta-get-up-me-my-arrow-harry-nilsson-cover-7inch
https://open.spotify.com/track/5KjRITicSHJM88w3U9LwLM
Please 🔁 BOOST to share what you like
- your followers don't see if you ⭐ favourite a post

Yes, that IS a full size electricity pylon embedded in the ground like an arrow. #London #PublicArt

Added a customizable 2D vector field plot function for #ThingUmbrella

Declarative, functional & multi-format data visualization toolkit based around @thi.ng/hiccup

Arrow-Lake-Refresh soll mit mehr als nur einem Taktplus erscheinen
Bis zum Jahresende soll eine Neuauflage der Core Ultra 200S erscheinen. Offenbar mit dabei: eine stärkere KI-Einheit.
https://…

This https://arxiv.org/abs/2504.06151 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csOS_…

Zerrow: True Zero-Copy Arrow Pipelines in Bauplan
Bauplan is a FaaS-based lakehouse specifically built for data pipelines: its execution engine uses Apache Arrow for data passing between the nodes in the DAG. While Arrow is known as the "zero copy format", in practice, limited Linux kernel support for shared memory makes it difficult to avoid copying entirely. In this work, we introduce several new techniques to eliminate nearly all copying from pipelines: in particular, we implement a new kernel module that performs de-anonymization, thus eli…

High-level #concurrency in #Kotlin #Arrow
https://…

🇺🇦 #NowPlaying on #BBC6Music's #6MusicArtistCollection
Yo La Tengo:
🎵 Green Arrow
#YoLaTengo
https://phantompelicula.bandcamp.com/track/yo-la-tengo-green-arrow
https://open.spotify.com/track/6o65Xn8X3IXf7zmxVjXDWJ

This https://arxiv.org/abs/2405.06912 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

A simple model for twisted arrow $\infty$-categories
Twisted arrow $\infty$-categories of $(\infty,1)$-categories were introduced by Lurie, and they have various applications in higher category theory. Abellán García and Stern gave a generalization to twisted arrow $\infty$-categories of $(\infty,2)$-categories. In this paper we introduce another simple model for twisted arrow $\infty$-categories of $(\infty,2)$-categories.

The inner working of parquette/arrow data in R: #rstats

Unpacking Arrow Datasets – Notes from a data witch
A comment on how Datasets work in Apache Arrow. I’m not really sure who the audience for this one. Am I just talking to myself? Probably.

Thing my unifi thinks are cars: boxing bow and arrow toys against the trampoline
Things it thinks are not cars: a tractor.
Unifi stuff is pretty cool but the object detection is pretty weak.

Don’t you hate it when #FreeTube is being ip-blocked, and #YouTube automatically starts a mix playlist every time you click on a music video?
🤢 🤢

Combined Public Service Announcement and Today I Learned: if you have `CLICOLOR=1` on macOS, if you do an `ls` of a directory which is inside iCloud Drive, evicted files (i.e., those that cannot be immediately used, but need to be downloaded first from iCloud) show with a grey background… see below:
First, both files are in iCloud, but not locally available. They have a dotted cloud icons in the iCloud Status field of the Finder window, and a greyed background in the output of the `ls` …

Next stop in our NLP timeline is 2013, the introduction of low dimensional dense word vectors - so-called "word embeddings" - based on distributed semantics, as e.g. word2vec by Mikolov et al. from Google, which enabled representation learning on text.
T. Mikolov et al. (2013). Efficient Estimation of Word Representations in Vector Space.
…

Efficient Estimation of Word Representations in Vector Space
We propose two novel model architectures for computing continuous vector representations of words from very large data sets. The quality of these representations is measured in a word similarity task, and the results are compared to the previously best performing techniques based on different types of neural networks. We observe large improvements in accuracy at much lower computational cost, i.e. it takes less than a day to learn high quality word vectors from a 1.6 billion words data set. Fur…

Exclusive: Evidence of cell phone surveillance detected at anti-ICE protest (Alan Judd/Straight Arrow News)
https://san.com/cc/exclusive-evidence-of-cell-phone-surveillance-detected-at-anti-ice-protest/
http://www.memeorandum.com/250709/p131#a250709p131

Completely randomly and for absolutely no reason at all...
Arrow, "(Feeling) Hot Hot Hot"
#80sMusic #Soca #UKweather

Monomial arrow removal and the finitistic dimension conjecture
Karin Erdmann, Odysseas Giatagantzidis, Chrysostomos Psaroudakis, {\O}yvind Solberg
https://arxiv.org/abs/2506.23747

Monomial arrow removal and the finitistic dimension conjecture
In this paper, we introduce the monomial arrow removal operation for bound quiver algebras, and show that it is a novel reduction technique for determining the finiteness of the finitistic dimension. Our approach first develops a general method within the theory of abelian category cleft extensions. We then demonstrate that the specific conditions of this method are satisfied by the cleft extensions arising from strict monomial arrow removals. This crucial connection is established through the …

"When we say monumental, you had better believe it; the 500 pages of this volume, laid out with astonishing detail (and a very small font size) summarize the history and evolution of computers from 1945 to 1990. Throughout these pages, Waldrop reveals that the backbone, the axis, the arrow, the orientation, the mastermind of all that history was none other than Lick himself: he was the incarnation of the phrase “being at the right place at the right time”."

J. C. R. Licklider & M. Mitchell Waldrop
The writings of Jorge Luis Borges twist our perception of time and space. In between articles about Shaw, Chesterton, Wilde, and Coleridge, his 1952 book "Otras Inquisiciones" included an unexpected gem: a short story called "El Tiempo y J. W. Dunne". The question is, who was this John William Dunne and what does he have to do with time? Well, his name might be forgotten by contemporary audiences, but Dunne was the author of one of the biggest bestsellers of the first half of the twentieth cent…

Replaced article(s) found for q-bio.NC. https://arxiv.org/list/q-bio.NC/new/
[1/1]:
On the Arrow of Inference
https://arxiv…

Proof Analysis of A Foundational Classical Singlesuccedent Sequent Calculus
Khashayar Irani
https://arxiv.org/abs/2507.04449 https://…

Proof Analysis of A Foundational Classical Singlesuccedent Sequent Calculus
In this paper we investigate the question: 'How can A Foundational Classical Singlesuccedent Sequent Calculus be formulated?' The choice of this particular area of proof-theoretic study is based on a particular ground that is, to formulate a robust and foundational classical singlesuccedent sequent calculus that includes a number of novel rules with the ultimate aim of deriving the singlesuccedent sequent Γ sequent arrow C. To this end, we argue that among all standard sequent calculi (at leas…

Topology of the Generalized Nash Equilibrium Problem
Matija Blagojevi\'c, Christof Sch\"utte
https://arxiv.org/abs/2507.03753 https://

Topology of the Generalized Nash Equilibrium Problem
The Generalized Nash Equilibrium Problem refers to the question of the existence of a Nash equilibrium in an abstract economy. This model is due to Kenneth J. Arrow and Gerard Debreu in their pioneering work from 1954. An abstract economy is an extension of John Nash's original concept of a non-cooperative game from the 1950's. Here players selfishly seek to maximize their profits, which may depend on the others' choices. The novelty of an abstract economy is that the players may now mutually c…

Union Street (formerly Grope Lane, before being changed to Grove Lane in 1821), Wells (Somerset), April 2025
#photography

There's a whole bunch of recent #ThingUmbrella updates which I still have to write about, but one of the things is the reworked, improved and more customizable optical flow (aka https://thi.ng/pixel-flow

Naive, lightweight CPU-based dense optical flow implementation

There's still time. Get out and vote, Canada.
It's a big one.
#Election #Canada #Vote

The Aurellion Function: A Recursive Fast-Growing Hierarchy Beyond Knuth Notation
Daniel Vodrazka (Independent theorist)
https://arxiv.org/abs/2506.05067 ht…

The Aurellion Function: A Recursive Fast-Growing Hierarchy Beyond Knuth Notation
We introduce the Aurellion Function, a novel recursively defined fast-growing hierarchy based on Knuth's up-arrow notation, defined by $A_1 = 10 \uparrow\uparrow\uparrow 10$, $A_{n+1} = 10 \uparrow^{A_n} 10$, where the number of arrows in the operation increases superexponentially with $n$. We analyze its growth rate relative to classical hierarchies such as the fast-growing hierarchy $(f_α)_{α< \varepsilon_0}$, and discuss its provability status in formal arithmetic. We provide formal bounds…

Urban Solitude 🈳
城市孤独 🈳
📷 Pentax MX
🎞️Fujifilm Neopan SS, expired 1995
buy me ☕️ ?/请我喝杯☕️？
#filmphotography

Yiding Cao Geld mit PayPal.Me senden
Folgen Sie dem Link PayPal.Me/dingsterdingster und geben Sie den Betrag ein. Es ist bequem und sicher. Sie haben noch kein PayPal-Konto? Kein Problem.

new blog post: RSS Converter for Mastofeed
#Mastodon

Maybe I'm reading too much into this, but the top looks like Homer Simpson and the bottom looks like my mother accusing me of doing something I didn't even do.

Did another thing! #NYC #NYCPol #DontRankCuomo

Love the open space posters at #accde25 😍

Proportional Response Dynamics in Gross Substitutes Markets
Yun Kuen Cheung, Richard Cole, Yixin Tao
https://arxiv.org/abs/2506.02852 https://

Proportional Response Dynamics in Gross Substitutes Markets
Proportional response is a well-established distributed algorithm which has been shown to converge to competitive equilibria in both Fisher and Arrow-Debreu markets, for various sub-families of homogeneous utilities, including linear and constant elasticity of substitution utilities. We propose a natural generalization of proportional response for gross substitutes utilities, and prove that it converges to competitive equilibria in Fisher markets. This is the first convergence result of a propo…

Randall Monroe's recent "xkcd What if" video has a Great Lakes connection.
"What if you funneled Niagara Falls through a straw?"
Super cool system where we did fieldwork some year ago.
Kudos for mentioning trouble with the Niagara Board of Control. 🏅
https://youtu.be/pfbzrr…

So my Netgear ORBI router died after seven years. It always amazes me when a simple "board in a box" appliance with no moving parts suddenly fails. It's bricked, and the "corrupted firmware" LED blinks if you try and factory reset it. Why?
Only sign of visible stress are these metal boxes just before the antenna connections. Looks like they got a bit warm. Transformers? I suppose these could have shorted and taken something else with it.

BookletCreator is a simple tool that allows you to create a booklet from a PDF document. It reorders pages so that after printing and folding the pages, a small book is created.
#GeekOfTheWeek

Microstates : Do the outliers worth
Olivier Sire
https://arxiv.org/abs/2506.16080 https://arxiv.org/pdf/2506.16080

Microstates : Do the outliers worth
This note addresses the relevance of rare events in system dynamics, inspired by Jill North reflections on the origin of the arrow of time in thermodynamics. After identifying the existence of rare events, characterized by a Pareto distribution, within a simple gas particle simulation, we investigate their impact on entropy evolution. These rare events are associated with microstates that locally decrease entropy, in contrast to the overall entropy increase observed in the bulk of the system. W…

Error-resilient Reversal of Quantum Chaotic Dynamics Enabled by Scramblons
Yu-Chen Li, Tian-Gang Zhou, Shengyu Zhang, Ze Wu, Liqiang Zhao, Haochuan Yin, Xiaoxue An, Hui Zhai, Pengfei Zhang, Xinhua Peng
https://arxiv.org/abs/2506.19915

Error-resilient Reversal of Quantum Chaotic Dynamics Enabled by Scramblons
The emergence of the arrow of time in quantum many-body systems stems from the inherent tendency of Hamiltonian evolution to scramble quantum information and increase entanglement. While, in principle, one might counteract this temporal directionality by engineering a perfectly inverted Hamiltonian to reverse entanglement growth, such a scenario is fundamentally unstable because even minor imperfections in the backward evolution can be exponentially amplified, a hallmark of quantum many-body ch…

This https://arxiv.org/abs/2302.07123 has been replaced.
initial toot: https://mastoxiv.page/@ar…

On the Arrow of Time and Organized Complexity in the Universe
There is a widespread assumption that the universe in general, and the biosphere on Earth in particular, is becoming more complex over time. This study formulates this assumption as a macroscopic law, the law of increasing complexity. It hypothesizes that this macroscopic law emerges in certain open systems, such as the observable universe and the biosphere on Earth. There are two types of complexity: disorganized and organized. The complexity associated with this assumption is organized comple…

Kid you not, this's the actual Back button in a "What's New" page for the #Microsoft #Edge #browser. 🫨
(There's a page with tiles for new features. You go to a details page when you select a tile. That detail page has this button to return to tiles page. Note the arrow direction.)
#UX #convention

Two Types of Temporal Symmetry in the Laws of Nature
A. Y. Klimenko
https://arxiv.org/abs/2506.15730 https://arxiv.org/pdf/2506.15730…

Two Types of Temporal Symmetry in the Laws of Nature
This work explores the implications of assuming time symmetry and applying bridge-type, time-symmetric temporal boundary conditions to deterministic laws of nature with random components. The analysis, drawing on the works of Kolmogorov and Anderson, leads to two forms of governing equations, referred to here as symmetric and antisymmetric. These equations account for the emergence of characteristics associated with conventional thermodynamics, the arrow of time, and a form of antecedent causal…

Editorial cartoon by Benjamin Slyngstad
#humor #cartoon #comedy #editorial