Tootfinder

Rota-Baxter operators on compact simple Lie groups and algebras
Saveliy V. Skresanov
https://arxiv.org/abs/2506.14324 https://arxiv.o…

Rota-Baxter operators on compact simple Lie groups and algebras
A Rota-Baxter operator on a Lie group $ G $ is a smooth map $ B : G \to G $ such that $ B(g)B(h) = B(gB(g)hB(g)^{-1}) $ for all $ g, h \in G $. This concept was introduced in 2021 by Guo, Lang and Sheng as a Lie group analogue of Rota-Baxter operators of weight 1 on Lie algebras. We show that the only Rota-Baxter operators on compact simple Lie groups are the trivial map and the inverse map. A similar description for Rota-Baxter operators of weight 1 on compact simple Lie algebras is provided.

On approximate quantum error correction for symmetric noise
Gereon Ko{\ss}mann, Julius A. Zeiss, Omar Fawzi, Mario Berta
https://arxiv.org/abs/2507.12326 h…

On approximate quantum error correction for symmetric noise
We revisit the extendability-based semi-definite programming hierarchy introduced by Berta et al. [Mathematical Programming, 1 - 49 (2021)], which provides converging outer bounds on the optimal fidelity of approximate quantum error correction (AQEC). As our first contribution, we introduce a measurement-based rounding scheme that extracts inner sequences of certifiably good encoder-decoder pairs from this outer hierarchy. To address the computational complexity of evaluating fixed levels of th…

Le Dalai-Lama et son manque de discernement : En 1998, il était au courant des procédures juridiques contre la OKC. Découvrez plus d'informations ici :
https://okcinfo.chardonsbleus.org/2021/individus/…

🤯 Been working for hours and missed the newest eruption 🌋🇮🇸
#Iceland

Gossprungan hætt að lengjast - RÚV.is
Eldgos hófst á Sundhnúksgígaröðinni á Reykjanesskaga klukkan 03:54.Þetta er níunda gosið á þessum slóðum og það tólfta á Reykjanesskaga frá því að hrinan hófst með gosi við Fagradalsfjall í mars 2021.Kvikuhlaup hófst rétt fyrir miðnætti með ákafri jarðskjálftahrinu.Búið er að rýma Bláa lónið og tjaldsvæðið í Grindavík.Hættustig almannavarna hefur verið virkjað og hættumat fyrir svæðið hefur verið uppfært.Gossprungan er tæplega tveggja kíl…

The Case against Scale: Empirical Evidence of Underperformance in Large Secondary Funds
Jitesh Gurav
https://arxiv.org/abs/2507.12436 https://

The Case against Scale: Empirical Evidence of Underperformance in Large Secondary Funds
The paper analyses the increasing popularity of large funds in the secondary private equity market, which are pegged on the perceived larger scale advantages of operational efficiency and fewer manager relationships (Reuter & Zitzewitz, 2021). However, it has been proved empirically that smaller funds perform better than the big ones in terms of their internal rates of return (IRRs). This work questions this authoritative view, providing evidence of outperformance of smaller funds relative to t…

Banjo Virtual Instrument Comparison Review
#Banjo #VI #MusicianTips

Banjo Virtual Instrument Comparison Review
Stan Stewart - @muz4now

Jon Gruden vs. NFL lawsuit: Nevada Supreme Court sides with former coach in ongoing battle vs. league

https://www.cbssports.com/nfl/news/jon-gru

from my link log —
Weird architectures weren't supported to begin with.
https://blog.yossarian.net/2021/02/28/Weird-architectures-werent-supported-to-begin-with
saved 2025-04-12

Weird architectures weren't supported to begin with

Probing the energy-dependent temporal nature of MAXI J1803-298 with AstroSat and NICER
Arbind Pradhan, Akash Garg, Ranjeev Misra, Biplob Sarkar
https://arxiv.org/abs/2508.07843 …

Probing the energy-dependent temporal nature of MAXI J1803-298 with AstroSat and NICER
We performed the spectral and temporal analysis of MAXI J1803-298 using AstroSat/LAXPC and NICER observations taken in May 2021 during the initial phase of the outburst. We found that the source traverses through the hard, intermediate, and soft spectral states during the outburst. The spectrum in all states can be described using soft emissions from the thermal disk and hard emissions from the coronal regions. The variation in the inner disk temperature and normalization of the disk indicates …

Kumulativer Zubau von #Balkonsolarleistung in #Deutschland mit Stand vom 08.08.2025.
Die summarische Leistung aller offiziell registrierten #Steckersolaranlagen beträgt…

Robustness of Floquet topological phase at room temperature: a first-principles dynamics study
Ruiyi Zhou, Yosuke Kanai
https://arxiv.org/abs/2506.12005 ht…

Robustness of Floquet topological phase at room temperature: a first-principles dynamics study
Nonadiabatic Thouless pumping of electrons is studied within the framework of topological Floquet engineering, particularly focused on how atomic lattice dynamics affect the emergent Floquet topological phase in trans-polyacetylene under the driving electric field. As similarly done in the earlier work [Zhou and Kanai, J. Phys. Chem. Lett., 12, 4496 (2021)], the real-time time-dependent density functional theory and Ehrenfest dynamics simulations were used to investigate the extent to which the…

Refuting Perfect Matchings in Spectral Expanders is Hard
Ari Biswas, Rajko Nenadov
https://arxiv.org/abs/2506.07700 https://arxiv.org…

Refuting Perfect Matchings in Spectral Expanders is Hard
This work studies the complexity of refuting the existence of a perfect matching in spectral expanders with an odd number of vertices, in the Polynomial Calculus (PC) and Sum of Squares (SoS) proof system. Austrin and Risse [SODA, 2021] showed that refuting perfect matchings in sparse $d$-regular \emph{random} graphs, in the above proof systems, with high probability requires proofs with degree $Ω(n/\log n)$. We extend their result by showing the same lower bound holds for \emph{all} $d$-regul…

May It Be Time #NowPlaying https://muz4now.com/2021/may-it-be-time-nowplaying/

May It Be Time #NowPlaying
Stan Stewart - @muz4now

Blue Lights, Insurmountable Debt, and the Affordances of its Erasure
https://ift.tt/QBFGeTE
By Justin Martin In The Dawn of Everything: A New History of Humanity (2021), anthropologist David…
via Input 4 RELCFP

Blue Lights, Insurmountable Debt, and the Affordances of its Erasure
By Justin Martin In The Dawn of Everything: A New History of Humanity (2021), anthropologist David Graeber and Archeologist David Wengrow set out to offer a new way of thinking about the human orig…

Identification of OB associations using the LAMOST-Gaia OB star sample
Zhicun Liu, Xiao-Long Wang, Wenyuan Cui, Jianrong Shi, Chao Liu, Xiang-Xiang Xue, Min Fang, Yang Huang, Guozhen Hu, Gang Zhao
https://arxiv.org/abs/2508.07599

Identification of OB associations using the LAMOST-Gaia OB star sample
OB associations, as an intermediate stage between Galactic clusters and field stars, play an important role in understanding the star formation process, early stellar evolution, and Galactic evolution. In this work, we construct a large sample of OB stars with 6D phase space parameters ($l, b, d, V_{\rm los}, pmra ,pmdec$) by combining the distances from Bailer-Jones et al. (2021), radial velocities derived from low-resolution spectra of the Large Sky Area Multi-Object Fiber Spectroscopic Teles…

Surgeons Awareness, Expectations, and Involvement with Artificial Intelligence: a Survey Pre and Post the GPT Era
Lorenzo Arboit, Dennis N. Schneider, Toby Collins, Daniel A. Hashimoto, Silvana Perretta, Bernard Dallemagne, Jacques Marescaux, EAES Working Group, Nicolas Padoy, Pietro Mascagni
https://arxiv.org/abs/2506.08258

Surgeons Awareness, Expectations, and Involvement with Artificial Intelligence: a Survey Pre and Post the GPT Era
Artificial Intelligence (AI) is transforming medicine, with generative AI models like ChatGPT reshaping perceptions of its potential. This study examines surgeons' awareness, expectations, and involvement with AI in surgery through comparative surveys conducted in 2021 and 2024. Two cross-sectional surveys were distributed globally in 2021 and 2024, the first before an IRCAD webinar and the second during the annual EAES meeting. The surveys assessed demographics, AI awareness, expectations, inv…

Gruden wins key Nevada ruling in NFL emails suit https://www.espn.com/nfl/story/_/id/45949298/nevada-high-court-sides-ex-raiders-coach-jon-gruden-nfl-emails-lawsuit

CB Insights: Figma's IPO was the largest venture-backed IPO by market capitalization for a US tech company since Rivian's debut in November 2021 (Yuliya Chernova/Wall Street Journal)
https://www.wsj.com/articles/fig…

Anzahl der errichteten #Balkonkraftwerke pro Jahr in #Deutschland mit Stand vom 10.07.2025.
Unplausible Inbetriebnahmedaten von 1900 bis 2015 wurden durch das Registrierungsdatum der #Steckersolaranlage

Antiquantum $q$-series and mock theta functions
Amanda Folsom, David Metacarpa
https://arxiv.org/abs/2507.03824 https://arxiv.org/pdf…

Antiquantum $q$-series and mock theta functions
Ramanujan's original definition of mock theta functions from 1920 involves their asymptotic behaviors at roots of unity on the boundary of the disk of convergence $|q|<1$. More recently this topic has been related by several authors, including the first author with Ono and Rhoades in 2013, to quantum modular forms, first defined in 2010 by Zagier. In 2021, Lovejoy defined and studied related quantum $q$-series identities, which do not hold as equalities between power series inside the…

Gear Fever - Musicians, Take Your Temperature
#MusicianTips #GearAquisitionSyndrome
https://

Gear Fever - Musicians, Take Your Temperature
Stan Stewart - @muz4now

"#Duluth as a climate refuge" #Minnesota (from 2021)
Opinion: As people flee climate change on the coasts, this Midwest city is trying to become a safe haven | CNN

As people flee climate change on the coasts, this Midwest city is trying to become a safe haven
After visiting Tracy, a woman in California who is ready to flee her dream house to escape wildfires and other effects of climate catastrophe, John Sutter traveled halfway across the country, to Duluth, Minnesota to try to answer her question: Where can she go? Is anywhere safe? It turns out, Tracy isn’t alone in asking the question.

Certification of High-Dimensional Entanglement Within the Resource Theory of Buscemi Nonlocality
Xian Shi
https://arxiv.org/abs/2506.07195 https://

Certification of High-Dimensional Entanglement Within the Resource Theory of Buscemi Nonlocality
The study on the certification of high degree entanglement, which is quantified in terms of Schmidt number, attracts much attention recently. Drawing inspiration from the work [PRX QUANTUM 2, 020301 (2021)], we first introduce resource theories of distributed measurements and teleportation instruments generated by a bipartite mixed state. Next we quantitatively characterized the relations among the convex resource theories of distributed measurements, teleportation instruments, and bipartite mi…

👋 Hello! I’m Łukasz. Thirty-something, living in Warsaw, Poland. On fedi since 2021 or so. Right now, I'm merging my two accounts into one and giving this profile a fresh new start.
I live a few parallel lives.
Most of the time I’m a web developer. I work with TypeScript, React and all that jazz. But I still enjoy static site generators and good ol’ HTML/CSS.
In another life, I’m a documentary photographer and photojournalist. I’m interested in activism, art and culture, politics, and pretty much anything interesting happening on city streets. A big part of my photography journey involves documenting protests and demonstrations in Poland, especially those related to human rights and social issues. I’m also drawn to street art, particularly when it carries strong messages.
I occasionally blog and translate. Many years ago I wrote two books about WordPress. However, these days I’m more likely to go outside and touch grass than spend even more time in front of a screen.
Outside of that, expect me to post about mental health and politics. I promise to use CWs when appropriate.
I post in both English and Polish, depending on the topic.
Aaaand that’s it. Nice to meet you! ☺️
#introduction

Diarycast - End of Year Roundup (2021-12-28) - Omicron, a rant about bad people, and more shy Eurasian footwear... #podcast #lockdown - https://www.…

Diarycast - End of Year Roundup (2021-12-28)
Omicron, a rant about bad people, and more shy Eurasian footwear... #podcast #lockdown

Kumulativer Zubau von #Balkonsolarleistung in #Deutschland mit Stand vom 10.07.2025.
Die summarische Leistung aller offiziell registrierten #Steckersolaranlagen beträgt…

So You Want To Be A Copywriter With Bernadette Schwerdt
Great Australian Pods Podcast Directory: https://www.greataustralianpods.com/so-you-want-to-be-a-copywriter-with-bernadette-schwerdt/

So You Want To Be A Copywriter | Great Australian Pods Podcast Directory
Podcast: So You Want To Be A Copywriter With Bernadette Schwerdt Host: Bernadette Schwerdt Category: Business Sub-Category: Careers, How To, Marketing & Social Media First Episode: 2021 Join Australia’…

Gruden eager to find 'truth' in NFL emails case https://www.espn.com/nfl/story/_/id/45960156/jon-gruden-eager-discover-truth-nfl-emails-lawsuit

A three-step approach to reliably estimate magnetic field strengths in star-forming regions
Aristeidis Polychronakis, Aris Tritsis, Raphael Skalidis, Konstantinos Tassis
https://arxiv.org/abs/2507.06297

A three-step approach to reliably estimate magnetic field strengths in star-forming regions
The magnetic field is known to play a crucial role in star formation. Dust polarization is an effective tool for probing the morphology of the field, yet it does not directly trace its strength. Several methods have been developed, combining polarization and spectroscopic data, to estimate the strength of the magnetic field, including the DCF method, which relates these quantities to the magnetic-field strength under the assumption of Alfvénic turbulence. Skalidis & Tassis (2021) (ST), relaxed…

The $3$-sparsity of $X^n-1$ over finite fields
Kaimin Cheng
https://arxiv.org/abs/2507.06655 https://arxiv.org/pdf/2507.06655

The $3$-sparsity of $X^n-1$ over finite fields
Let $q$ be a prime power and $\mathbb{F}_q$ the finite field with $q$ elements. For a positive integer $n$, the binomial $f_n(X):= X^n-1\in\mathbb{F}_q[X]$ is called $3$-sparse over $\mathbb{F}_q$ if each irreducible factor of $f_n(X)$ over $\mathbb{F}_q$ is either a binomial or a trinomial. In 2021, Oliveira and Reis characterized all positive integers $n$ for which $f_n(X)$ is $3$-sparse over $\mathbb{F}_q$ when $q = 2$ and $q = 4$, and posed the open problem of whether, for any given $q$, th…

Joel Bitonio: Browns getting back to 2020, 2021 running schemes, 'a strength' of Cleveland's O-line https://www.nfl.com/news/joel-bitonio-browns-returning-running-schemes-a-strength-offensive-line

Assessing innovation in the nascent value chains of climate-mitigating technologies
Zachary H. Thomas, Ellen D. Williams, Kavita Surana, Morgan R. Edwards
https://arxiv.org/abs/2506.00010

Assessing innovation in the nascent value chains of climate-mitigating technologies
Accelerating climate-tech innovation in the formative stage of the technology life cycle is crucial to meeting climate policy goals. During this period, competing technologies are often undergoing major technical improvements within a nascent value chain. We analyze this formative stage for 14 climate-tech sectors using a dataset of 4,172 North American firms receiving 12,929 early-stage private investments between 2006 and 2021. Investments in these firms reveal that commercialization occurs i…

Making a Case for Research Collaboration Between Artificial Intelligence and Operations Research Experts
Radhika Kulkarni, Gianluca Brero, Yu Ding, Swati Gupta, Sven Koenig, Ramayya Krishnan, Thiago Serra, Phebe Vayanos, Segev Wasserkrug, Holly Wiberg
https://arxiv.org/abs/2507.21076

Making a Case for Research Collaboration Between Artificial Intelligence and Operations Research Experts
In 2021, INFORMS, ACM SIGAI, and the Computing Community Consortium (CCC) hosted three workshops to explore synergies between Artificial Intelligence (AI) and Operations Research (OR) to improve decision-making. The workshops aimed to create a unified research vision for AI/OR collaboration, focusing on overcoming cultural differences and maximizing societal impact. The first two workshops addressed technological innovations, applications, and trustworthy AI development, while the final worksho…

Recent Chemo-morphological Coma Evolution of Comet 67P/Churyumov-Gerasimenko
Brian P. Murphy, Cyrielle Opitom, Colin Snodgrass, Sophie E. Deam, L\'ea Ferellec, Matthew Knight, Bin Yang, Vincent Okoth
https://arxiv.org/abs/2507.13979

Recent Chemo-morphological Coma Evolution of Comet 67P/Churyumov-Gerasimenko
We present VLT/MUSE observations of comet 67P/Churyumov-Gerasimenko during its 2021 perihelion passage, from which we generated simultaneous maps of dust, [OI], C$_2$, NH$_2$, and CN comae across 12 pre- and post-perihelion epochs. These maps reveal the evolutionary and compositional trends of 67P's coma and further enrich the context and findings of ESA's Rosetta mission. Dust and gas species displayed distinct structures, where NH$_2$ and CN signals were uniquely associated with known dust fa…

Hamilton Cycles In Vertex-Transitive Graphs of Order 10p
Huye Chen, Jingjian Li, Hao Yu
https://arxiv.org/abs/2506.19888 https://arxi…

Hamilton Cycles In Vertex-Transitive Graphs of Order 10p
After a long term efforts, the Hamiltonian problem of connected vertex-transitive graphs of order $pq$ (where $p$ and $q$ are primes) was finally finshed in 2021, see [10]. Fifteen years ago, mathematicians began to challenge this problem for graphs of order $2pq$. Among of them, it was proved in 2012 (see [21]) that every connected vertex-transitive graph of order $10p$ (where $p\neq7$ is a prime) contains a Hamilton path, with the exception of a family of graphs which was recently confirmed i…

This https://arxiv.org/abs/2504.13658 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

SRGAJ230631.0+155633: an extremely X-ray luminous, heavily obscured, radio-loud quasar at z=0.44 discovered by SRG/ART-XC
We report on a detailed study of a luminous, heavily obscured ($N_{\rm H} \sim 2 \times 10^{23}$ cm$^{-2}$), radio-loud quasar SRGAJ230631.0+155633, discovered in the 4--12 keV energy band by the Mikhail Pavlinsky ART-XC telescope aboard the SRG observatory during the first two years of its all-sky X-ray survey in 2020--2021. The object is located at $z=0.4389$ and is a type 2 AGN according to optical spectroscopy (SDSS, confirmed by DESI). We combine radio-to-X-ray data, including near-simulta…

Jährlicher Zubau und Rückbau von #Balkonsolarleistung in Deutschland mit Stand vom 18.07.2025.
Unplausible Inbetriebnahmedaten von 1900 bis 2015 wurden durch das Registrierungsdatum der #Steckersolaranlage ersetzt.