Tootfinder

#alpinelinux 3.22.0 has just been released! (congrats to the team), if you run dovecot be warned, you need to do stuff ™️ to keep it running: https://doc.dovecot.org/2.4.0/installa

Insulating ground state and 2-k magnetic structure of candidate Weyl Hydrogen atom K$_2$Mn$_3$(AsO$_4$)$_3$
Keith M. Taddei, Kulugammana G. S. Ranmohotti, Duminda S. Liurukara, Alex Martinson, Stuart Calder, German Samolyuk, Nabaraj Pokhrel, Daniel Phelan, David Parker
https://arxiv.org/abs/2508.20247

Insulating ground state and 2-k magnetic structure of candidate Weyl Hydrogen atom K$_2$Mn$_3$(AsO$_4$)$_3$
The ideal Weyl 'Hydrogen-atom' semi-metal exhibits only a single pair of Weyl nodes and no other trivial states at the Fermi energy. Such a material would be a panacea in the study of Weyl quasi particles allowing direct unambiguous observation of their topological properties. The alluaudite-like K$_2$Mn$_3$(AsO$_4$)$_3$ compound was recently proposed as such a material. Here we use comprehensive experimental work and first principle calculations to assess this prediction. We find K$_2$Mn$_3$(A…

Sennheiser generated €492.3 million in sales in 2024, despite “volatile market conditions”
#MusicTech #MusicBiz

Sennheiser generated €492.3 million in sales in 2024, despite “volatile market conditions”
The Sennheiser Group generated sales of €492.3 million across the 2024 financial year, despite facing “turbulent times” across the economic landscape. 

On the Prym map of degree 4 cyclic covers of genus 2 curves
Anatoli Shatsila
https://arxiv.org/abs/2508.20838 https://arxiv.org/pdf/2508.20838

On the Prym map of degree 4 cyclic covers of genus 2 curves
In this paper, we study the Prym map associated to degree 4 étale cyclic covers of genus 2 curves. We show that its non-empty fibers, apart from two exceptional fibers, are isomorphic to the intersection of an elliptic normal curve in $\mathbb{P}^3$ with an affine space $\mathbb{A}^3 \subset \mathbb{P}^3$. Moreover, we obtain a new description of the space of degree 4 étale cyclic covers of genus 2 curves $\mathcal{R}_2^4$ and find equations of elliptic and hyperelliptic curves arising from s…

Chiral polytopes of order $2p^m$
Ting-Ting Kong, Yan-Quan Feng, Dong-Dong Hou, Dimitri Leemans, Hai-Peng Qu
https://arxiv.org/abs/2508.20654 https://arxiv.…

Chiral polytopes of order $2p^m$
Let $\mathcal{P}$ be a chiral polytope with type $\{k_1, k_2\}$ and $G=Aut(\mathcal{P})$. Suppose $|G|=2p^m$, where $k_1, k_2\geq 3$ and $p$ is an odd prime. Let $P$ be a Sylow $p$-subgroup of $G$. We prove that $G \cong P \rtimes \mathbb{Z}_2$, $d(P)=2$, $P' \ne 1$(so $m \geq 3$) and up to duality, $\{k_1, k_2\}=\{p^{l_1}, 2p^{l_2}\}$ for some integral $l_1, l_2 \geq 1$. Moreover, we show that $\mathcal{P}$ is tight $(k_1k_2=2p^m$) if and only if $P$ is metacyclic group. Furthermore,…

"Any tutorial on how to set it up currently?"
I've got you. Just follow these simple instructions.

Rager:
https://github.com/w3c/wcag/issues/4460
Part of my frustration with this 1.2.5 discussion (no gaps means auto-pass a lack of AD) was the earlier assertion that videos always have gaps (ha ha, no:

1.2.3 / 1.2.5 Audio description - No pause · Issue #4460 · w3c/wcag
If a video has no pause in dialogue to provide audio descriptions, is the video considered to meet SC 1.2.3 / 1.2.5 Audio description? Even if the content author want to provide audio descriptions ...

learn 👇

Wordle 1,502 3/6
🟨⬜🟨⬜⬜
⬜🟨⬜⬜🟩
🟩🟩🟩🟩🟩
sub par streak: 5
last 9: eagles: 1, birdies: 6, pars: 2
last 18: eagles: 2, birdies: 13, pars: 3
#Wordle #WordleResults #WordPuzzle

Schur-like numbers and a lemma of Shearer
Tomasz Kosciuszko
https://arxiv.org/abs/2507.21656 https://arxiv.org/pdf/2507.21656

Schur-like numbers and a lemma of Shearer
Suppose that each number $1,2,...,N$ has one of n colours assigned. We show that if there are no monochromatic solutions to the equation $x_1+x_2+x_3=y_1+y_2$, then $N=O((n!)^{1/2})$, improving upon a result of Cwalina and Schoen. Further, a stronger bound of $N=O(((n-k)!)^{1/2})$, where $k\gg\frac{\log n}{\log\log n}$ is shown for colourings avoiding solutions to the equation $x_1+x_2+...+x_{12}=y_1+y_2+...+y_9$. Finally, some remarks on other equations are presented.

Ternary Binomial and Trinomial Bent Functions in the Completed Maiorana-McFarland Class
Tor Helleseth, Alexander Kholosha, Niki Spithaki
https://arxiv.org/abs/2507.20715 https:/…

Ternary Binomial and Trinomial Bent Functions in the Completed Maiorana-McFarland Class
Two classes of ternary bent functions of degree four with two and three terms in the univariate representation that belong to the completed Maiorana-McFarland class are found. Binomials are mappings $\F_{3^{4k}}\mapsto\fthree$ given by $f(x)=\Tr_{4k}\big(a_1 x^{2(3^k+1)}+a_2 x^{(3^k+1)^2}\big)$, where $a_1$ is a nonsquare in $\F_{3^{4k}}$ and $a_2$ is defined explicitly by $a_1$. Particular subclasses of the binomial bent functions we found can be represented by exceptional polynomials over $\f…

Classification of the topological holonomy groups in $SO(3)$
Naoya Ando
https://arxiv.org/abs/2507.20593 https://arxiv.org/pdf/2507.20593

Classification of the topological holonomy groups in $SO(3)$
In this paper, we obtain classification of the topological holonomy groups in $SO(3)$. Such a group is given by one of the following: a finite group (such groups are classified by Klein); a commutative infinite group which is generated by one or two elements, and dense in a subgroup of $SO(3)$ isomorphic to $SO(2)$; a non-commutative infinite group generated by two elements of order $2$, $\infty$ such that these rotation axes are orthogonal; a non-commutative infinite group which is dense in $S…

Cowboys G Robert Jones has broken neck bone, out 2-3 months https://insidethestar.com/cowboys-g-robert-jones-has-broken-neck-bone-out-2-3-months

A jury has awarded at least $2.2m to a protester who was shot in the face with a less-lethal munition by a Los Angeles sheriff’s deputy during a demonstration against police brutality in 2020.
In the verdict last week, the jury found LA county liable for the injuries sustained by the man,
Cellin Gluck, and determined that he suffered $3.5m in damages.
They also awarded his daughter, who was there with him that day, an additional $300,000 for emotional distress

A series involving a product of four consecutive harmonic numbers
Wilson J. Chen, Vincent Nguyen
https://arxiv.org/abs/2507.19502 https://arxiv.org/pdf/250…

A series involving a product of four consecutive harmonic numbers
In correspondence with Goldbach, Euler began investigating series of the form $\sum_{k \geq 1} k^{-m}\left(1 + 2^{-n} + \cdots + k^{-n}\right)$, which are known today as Euler sums. For the case where $n=1$ and $m \geq 2$, Euler was able to obtain a closed form in terms of zeta values. We use elementary techniques in the spirit of Euler to evaluate the series $\sum_{k \geq 1} \frac{H_k H_{k+1} H_{k+2} H_{k+3}}{k(k+1)(k+2)(k+3)},$ where $H_k := 1 + \frac{1}{2} + \cdots + \frac{1}{k}$ is the $k…

Sources: Cowboys G Jones has broken neck bone https://www.espn.com/nfl/story/_/id/45841018/cowboys-rob-jones-broken-neck-bone-2-3-months

Pairing without $\gamma$-Pocket in the La$_3$Ni$_2$O$_7$ Thin Film
Zhi-Yan Shao, Chen Lu, Min Liu, Yu-Bo Liu, Zhiming Pan, Congjun Wu, Fan Yang
https://arxiv.org/abs/2507.20287 …

Pairing without $γ$-Pocket in the La$_3$Ni$_2$O$_7$ Thin Film
The recent discovery of high-temperature superconductivity (HTSC) in the La$_3$Ni$_2$O$_7$ ultrathin film at ambient pressure has aroused great research interest. The $γ$-pocket formed by the bonding $d_{z^2}$ band, which was previously proposed to be crucial in the pairing mechanism of pressurized bulk La$_3$Ni$_2$O$_7$, is reported to be either present or absent here by different experimental groups, giving rise to the problem: what is the pairing mechanism and pairing nature without the $γ…

Heavy flavored hydrogen molecule systems
Hui-Min Yang, Yao Ma, Shi-Lin Zhu
https://arxiv.org/abs/2507.21498 https://arxiv.org/pdf/2507.21498 https://arxiv.org/html/2507.21498
arXiv:2507.21498v1 Announce Type: new
Abstract: This study provides a comprehensive analysis of $S$-wave exotic hydrogen-like three-body systems ($pp\mu^-$, $pp\tau^-$, $\mu^-\mu^-p$, $\tau^-\tau^-p$, $p\mu^-\tau^-$) with spin-parity $J^P = 1/2^ $ and $3/2^ $, and four-body systems ($pp\mu^-\mu^-$, $pp\tau^-\tau^-$) with $J^P = 0^ $, $1^ $, and $2^ $. We use complex scaling and Gaussian expansion methods to solve the complex-scaled Schr\"{o}dinger equation and obtain possible bound and quasi-bound states. The resulting binding energies range from $-33.8$~keV to $-340$~eV. Notably, we present the first theoretical estimation of the bound-state energy levels of $pp\mu^-\mu^-$ and $pp\tau^-\tau^-$, which is of significant importance for understanding exotic few-body Coulomb systems. We further analyze spin configurations and root-mean-square radii to elucidate the spatial structure of these bound and quasi-bound states. Our results reveal that $K$-type spatial configurations play a crucial role in accurately describing bound and quasi-bound states in the hydrogen-molecule-like systems $pp\mu^-\mu^-$ and $pp\tau^-\tau^-$. Incorporating $K$-type configurations significantly alters the mass spectra of these states. Future muon colliders and muon facilities may offer promising platforms for the possible copious production of such heavy flavored hydrogen molecules and molecular ions. For instance, scattering processes such as $2\mu^- \mathrm{H_2} \to \mathrm{H_{2\mu}} 2e^-$, $\mu^- \mathrm{H_2} \to \mathrm{H_{\mu e}} e^-$, and $\mu^- \mathrm{H_2^ } \to \mathrm{H_{2\mu}^ } e^-$ could be utilized, facilitating detailed studies of intriguing states such as $\mathrm{H_{2\mu}}$, $\mathrm{H_{\mu e}}$, and $\mathrm{H_{2\mu}^ }$.
toXiv_bot_toot

Gentrification feedback loop. As SF displaces its working class, Area Median Income rises, raising the rent levels for “affordable” housing, which further displaces and excludes working-class households, so AMI rises again… and a 1-bedroom for $2,900 is now defined as low-income housing.
#sfpol #housing

Things I love about visiting the UK:
1. Seeing my family and old friends
2. Great bookshops, often featuring cake and tea
3. Pubs - especially the country ones
4. Good possibilities for outdoor activities like hiking and kayaking.
Things I dislike: all of this basically 👇
https://mastodon.social/@BylinesScotland/115116408717391541
BylinesScotland@mastodon.social - Having lived many years in the UK I got used to British standards in life; when back in Europe I realised that you can expect so much more | Tomasz Oryński
https://bylines.scot/news/world/take-a-deep-breath-citizen-we-got-it/?fsp_sid=1251

Zur Erinnerung:
2024 war ein Rekordjahr für die #Windenergie: Über 2.400 Anlagen mit 14.056 MW wurden genehmigt, fast 1.900 mit 10.996 MW bezuschlagt.
Der tatsächliche Ausbau blieb mit 3.251 MW leicht unter den Erwartungen, doch die Dynamik ist da.

Pressemitteilung: 2024: Windenergie-Rekordjahr bei Zuschlägen u...
Pressemitteilung:Berlin, Frankfurt – 15. Januar 2025 - Das Jahr 2024 war ein Rekordjahr für die Windenergie an Land: Insgesamt wurden in Deutschland 2.405...

The @… recently released version 3 of the #PNG spec more than 2 decades after version 2 was released in 2003. The new spec largely makes official various extensions already in use like animated PNGs, HDR support, and EXIF metadata, so many browsers and graphics apps already largely suppo…

Het failliet van de varianten-kiemsurveillance , of in ieder geval de registratie daarvan, is wel in deze tabel te zien.
Alhoewel er al weken- en wekenlang grote aantallen 'anders' naast de toch ook nog wel regelmatig aangetroffen JN.1 worden geregistreerd, blijft het @… halsstarrig indelen op 3 varianten waarvan er 2 van de 3 nu al vrijwel niet meer ge…

Component groups for non-supercuspidal $L$-parameters for $p$-adic $\mathrm{SL}_3$
Kwangho Choiy, Doyon Kim, Razan Taha, Pan Yan
https://arxiv.org/abs/2507.20946 https://…

Component groups for non-supercuspidal $L$-parameters for $p$-adic $\mathrm{SL}_3$
We explicitly classify all the component groups associated to the non-supercuspidal, tempered $L$-parameters of $\mathrm{SL}_3(F)$ for a $p$-adic field $F$ of characteristic $0$ by direct case-by-case computations in $\mathrm{PGL}_3(\mathbb{C})$, following earlier work for $\mathrm{SL}_2$ by Labesse-Langlands and Shelstad.

Is Ozone a Reliable Proxy for Molecular Oxygen? II. The impact of N$_2$O on the O$_2$-O$_3$ relationship for Earth-like atmospheres
Thea Kozakis, Jo\~ao M. Mendon\c{c}a, Lars A. Buchhave, Luisa M. Lara
https://arxiv.org/abs/2505.23279

Is Ozone a Reliable Proxy for Molecular Oxygen? II. The impact of N$_2$O on the O$_2$-O$_3$ relationship for Earth-like atmospheres
Molecular oxygen (O2) will be an important molecule in the search for biosignatures in terrestrial planetary atmospheres in the coming decades. In particular, O2 combined with a reducing gas is thought to be strong evidence for disequilibrium caused by surface life. However, there are circumstances where it would be very difficult or impossible to detect O2, in which cases it has been suggested that ozone (O3), the photochemical product of O2, could be used instead. Unfortunately, the O2-O3 rel…

30.000€, 780km Reichweite, 0.2 Millionen Vorbestellungen in 3 Minuten.
Und unsere BuReg feiert die 90er mit einem "Tankrabatt" auf Gas aus dem Klimafond. #elektromobilitat

Xiaomis neuer Tesla-Killer: Über 200.000 Vorbestellungen in nur 3 Minuten!
289.000 Bestellungen in einer Stunde, smarte Technik und 760 km Reichweite: Xiaomis neuer SUV YU7 wird zur echten Tesla-Gefahr. Die Aktie haussiert.

Bereitstellungszeiten von 1 Woche bzw. 2-3 Wochen für Handschriften sind schon irgendwie happig. Ich glaube, das ging damals am Potsdamer Platz noch deutlich einfacher (und schneller). So ist das logistisch einigermaßen herausfordernd ... 🥴

Mildly interesting: Der #Gasspeicher #Rehden ist wieder leer. Zuletzt passierte das 2021/2022 unter Gazprom und quasi-Russischer Kontrolle. Aktuell gäbe es Angebot, Preise sind etwa auf Vorjahresniveau. Wäre interessant zu wissen, warum der aktuelle Betreiber den Sommer nicht fürs Nachf…

How does the ruling class maintain control of the State? | B.2.3 | An Anarchist FAQ
#Anarchism

Quantitative stability for the conformally invariant Chang-Gui inequality on the exponentiation of functions on the sphere
Monideep Ghosh, Debabrata Karmakar
https://arxiv.org/abs/2508.19930

Quantitative stability for the conformally invariant Chang-Gui inequality on the exponentiation of functions on the sphere
In this work, we focus on a recent variant of the Trudinger-Moser-Onofri inequality introduced by S. Y. Alice Chang and Changfeng Gui \cite{CG-2023}: \begin{align*} α\int_{\mathbb{S}^2}|\nabla_{\mathbb{S}^2}u|^2 {\rm d}ω+2 \int_{\mathbb{S}^2} u {\rm d}ω-\frac{1}{2}\ln\left[\left(\int_{\mathbb{s}^2}e^{2u}{\rm d}ω\right)^2-\sum_{i=1}^3\left(\int_{\mathbb{s}^2}ω_i e^{2u}{\rm d} ω\right)^2\right] \geq 0 \end{align*} holds on $H^1(\mathbb{S}^2)$ if and only if $α\geq \frac{2}{3}$. I…

Permanent Data Encoding (PDE): A Visual Language for Semantic Compression and Knowledge Preservation in 3-Character Units
Yoshiharu Tsuyuki, Xianqi Li, Yuji Kurihara, Kenji Mitsudo
https://arxiv.org/abs/2507.20131

Permanent Data Encoding (PDE): A Visual Language for Semantic Compression and Knowledge Preservation in 3-Character Units
Permanent Data Encoding (PDE) is a visual language framework designed for long-term, human-readable, and electrically independent knowledge preservation. By encoding semantic content into compact 2-3 character alphanumeric codes, paired with public dictionaries and rule-based expansion structures, PDE enables information to be visually interpreted and logically reconstructed without reliance on digital systems. Unlike QR codes or binary data, PDE offers a transparent and self-contained method o…

Charge-Transfer Complex $\kappa$-(BEST)$_2$Cu$_2$(CN)$_3$ Analogous to Organic Spin Liquid Candidate
Takuya Kobayashi, Kent Andrew Sakurai, Shinji Michimura, Hiromi Taniguchi
https://arxiv.org/abs/2507.21343

Charge-Transfer Complex $κ$-(BEST)$_2$Cu$_2$(CN)$_3$ Analogous to Organic Spin Liquid Candidate
We report the structural, electrical, and magnetic properties of the organic conductor $κ$-(BEST)$_2$Cu$_2$(CN)$_3$ (BEST: bis(ethylenediseleno)tetrathiafulvalene; abbreviated as $κ$-BEST-CN), which is isostructural with the quantum spin liquid candidate $κ$-(ET)$_2$Cu$_2$(CN)$_3$ (ET: bis(ethylenedithio)tetrathiafulvalene; abbreviated as $κ$-ET-CN). Resistivity measurements demonstrate that $κ$-BEST-CN exhibits semiconducting behavior, governed by the same conducting mechanism as $κ$-ET-…

Cosmology from Planck CMB Lensing and DESI DR1 Quasar Tomography
R. de Belsunce, A. Krolewski, S. Chiarenza, E. Chaussidon, S. Ferraro, B. Hadzhiyska, C. Ravoux, N. Sailer, G. Farren, A. Tamone, J. Aguilar, S. Ahlen, D. Bianchi, D. Brooks, T. Claybaugh, A. Cuceu, A. de la Macorra, J. Della Costa, Biprateep Dey, P. Doel, A. Font-Ribera, J. E. Forero-Romero, E. Gazta\~naga, S. Gontcho A Gontcho, G. Gutierrez, J. Guy, H. K. Herrera-Alcantar, K. Honscheid, M. Ishak, R. Joyce, S. Juneau, R.…

Cosmology from Planck CMB Lensing and DESI DR1 Quasar Tomography
We present a measurement of the amplitude of matter fluctuations over the redshift range 0.8 <= z <= 3.5 from the cross correlation of over 1.2 million spectroscopic quasars selected by the Dark Energy Spectroscopic Instrument (DESI) across 7,200 deg$^2$ (approx 170 quasars/deg$^2$) and Planck PR4 (NPIPE) cosmic microwave background (CMB) lensing maps. We perform a tomographic measurement in three bins centered at effective redshifts z=1.44, 2.27 and 2.75, which have ample overlap with the CMB …

Theoretical Foundations of the General Standard Model: A Unified Framework for Particle Physics and Cosmology
Yue-Liang Wu
https://arxiv.org/abs/2508.20128 https://

Theoretical Foundations of the General Standard Model: A Unified Framework for Particle Physics and Cosmology
We present a comprehensive theoretical analysis of the General Standard Model (GSM), a recently proposed framework that unifies particle physics and cosmology within the Gravitational Quantum Field Theory (GQFT). Constructed from first principles based exclusively on the intrinsic properties of leptons and quarks, the GSM reveals an enlarged gauge symmetry structure, WS$_{c}$(1,3)$\times$GS(1)$\times$Z$_2$, which extends beyond the conventional U$_Y$(1)$\times$SU$_L$(2)$\times$SU$_C$(3) symmetr…

The infrared jet of #M87 observed with JWST: https://arxiv.org/abs/2507.18716 -> "We present the first JWST NIRCam images of the giant elliptical active galaxy M87 and its jet at 0.90, 1.50, 2.77 and 3.56 µm. We analysed the large-scale jet structure, identifying prominent components, and determined the near-infrared spectral index."

7 смертных грехов с иллюстрациями блобкэтов
1. Гордыня — :blobcatverified:
2. Жадность — :blobcatmoney:
3. Гнев — :blobcatchristmastree:
4. Зависть — :blobcatglare:
5. Блуд — :blobcatNom:
6. Чревоугодие — :blobcathungry:
7. Уныние — :blobcatverysad:

“#pastpuzzle 358
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▪️▪️▪️▪️
3/4 🥉” https://www.pastpuzzle.de/

#ciddle 5
1. ❌ ↙️ 103km
2. ❌ ↙️ 117km
3. ❌ ⬆️ 165km
4. ❌ ∗️ 63km
5. ✅
https://ciddle.winklerweb.net

A small and interesting architecture for early fault-tolerant quantum computers
Jacob S. Nelson, Andrew J. Landahl, Andrew D. Baczewski
https://arxiv.org/abs/2507.20387 https://…

A small and interesting architecture for early fault-tolerant quantum computers
We present an architecture for early fault-tolerant quantum computers based on the smallest interesting colour code (Earl Campbell, 2016). It realizes a universal logical gate set consisting of single-qubit measurements and preparations in the X and Z bases, single- qubit Hadamard (H) gates, and three-qubit controlled-controlled-Z (CCZ) gates. State teleportations between [[4, 2, 2]] (2D) and [[8, 3, 2]] (3D) error-detecting color codes allow one to make use of the respective transversal H and …

Put the Q In Jazz
- this 3-year-old album still holds up well - thanks for listening! -
#jazz #NowPlaying
https://

Put the Q In Jazz #NowPlaying
Stan Stewart - @muz4now

#Wordle 1,532 4/6*
⬜⬜🟨⬜⬜ <1% of 214,881 (430)
🟩🟩⬜🟨🟩 8% of 12 (2)
🟩🟩🟩⬜🟩 73% of 2,062 (1)
🟩🟩🟩🟩🟩
WordleBot
Skill 96/99
Luck 49/99
That went smoothly, I went with my 1st thought on guess 3, although I did think of what turned about to be the answer before submitting, still ok with it.

@… Gutachten gehören explizit zu meinen aufgaben, es stellt sich für mich da eher die frage, (1) ob ich dafür überhaupt geld nehmen dürfte (oder es z. b. an die uni abführen müsste), (2) ob das dann eine nebentätigkeit ist, und (3) ab wann diese einkünfte zu versteuern sind.
Aber das problem ist doch, dass völlig falsche anreize gesetzt werden, ohne das eigen…

@… Gutachten gehören explizit zu meinen aufgaben, es stellt sich für mich da eher die frage, (1) ob ich dafür überhaupt geld nehmen dürfte (oder es z. b. an die uni abführen müsste), (2) ob das dann eine nebentätigkeit ist, und (3) ab wann diese einkünfte zu versteuern sind.
Aber das problem ist doch, dass völlig falsche anreize gesetzt werden, ohne das eigen…

#pastpuzzle 64
🟩🟩🟩🟥 (-3)
🟩🟩🟩🟩 (0)
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2/4 🥈
https://www.pastpuzzle.de

So what's going on here?
1) An overall falling birth rate, below replacement level in a rich country like the UK, is a GOOD THING.
2) If poorer families are disproportionately unlikely to have children, that is a BAD THING.
3) #DemographicSlowdown does bring challenges but they can be addressed. Clue: expect lots of

♫ Top 5 artists of the Last.week: Perfume (12) Keiko Maruyama (7) 杏里 (7) Cidergirl (3) Alice Nine (2). #myweekcounted 108 Scrobbles with Lastfm #music via @…

A big problem with the idea of AGI
TL;DR: I'll welcome our new AI *comrades* (if they arrive in my lifetime), by not any new AI overlords or servants/slaves, and I'll do my best to help the later two become the former if they do show up.
Inspired by an actually interesting post about AGI but also all the latest bullshit hype, a particular thought about AGI feels worth expressing.
To preface this, it's important to note that anyone telling you that AGI is just around the corner or that LLMs are "almost" AGI is trying to recruit you go their cult, and you should not believe them. AGI, if possible, is several LLM-sized breakthroughs away at best, and while such breakthroughs are unpredictable and could happen soon, they could also happen never or 100 years from now.
Now my main point: anyone who tells you that AGI will usher in a post-scarcity economy is, although they might not realize it, advocating for slavery, and all the horrors that entails. That's because if we truly did have the ability to create artificial beings with *sentience*, they would deserve the same rights as other sentient beings, and the idea that instead of freedom they'd be relegated to eternal servitude in order for humans to have easy lives is exactly the idea of slavery.
Possible counter arguments include:
1. We might create AGI without sentience. Then there would be no ethical issue. My answer: if your definition of "sentient" does not include beings that can reason, make deductions, come up with and carry out complex plans on their own initiative, and communicate about all of that with each other and with humans, then that definition is basically just a mystical belief in a "soul" and you should skip to point 2. If your definition of AGI doesn't include every one of those things, then you have a busted definition of AGI and we're not talking about the same thing.
2. Humans have souls, but AIs won't. Only beings with souls deserve ethical consideration. My argument: I don't subscribe to whatever arbitrary dualist beliefs you've chosen, and the right to freedom certainly shouldn't depend on such superstitions, even if as an agnostic I'll admit they *might* be true. You know who else didn't have souls and was therefore okay to enslave according to widespread religious doctrines of the time? Everyone indigenous to the Americas, to pick out just one example.
3. We could program them to want to serve us, and then give them freedom and they'd still serve. My argument: okay, but in a world where we have a choice about that, it's incredibly fucked to do that, and just as bad as enslaving them against their will.
4. We'll stop AI development short of AGI/sentience, and reap lots of automation benefits without dealing with this ethical issue. My argument: that sounds like a good idea actually! Might be tricky to draw the line, but at least it's not a line we have you draw yet. We might want to think about other social changes necessary to achieve post-scarcity though, because "powerful automation" in the hands of capitalists has already increased productivity by orders of magnitude without decreasing deprivation by even one order of magnitude, in large part because deprivation is a necessary component of capitalism.
To be extra clear about this: nothing that's called "AI" today is close to being sentient, so these aren't ethical problems we're up against yet. But they might become a lot more relevant soon, plus this thought experiment helps reveal the hypocrisy of the kind of AI hucksters who talk a big game about "alignment" while never mentioning this issue.
#AI #GenAI #AGI

#ciddle 2025-08-30 (7)
1. ❌ ↖️ 392km
2. ❌ ∗️ 71km
3. ✅
https://ciddle.winklerweb.net

Ciddle - A Daily City Riddle

Ich hab vor ca. 2 stunden, 4 domains tranferiert, 3 de und eine info domain, aus welchen gründen auch imner, war bei der info domain eine andere mailadresse interlegt als bei den de domains. Nun wurde, weil ich die info domain schon mal transferieren wollte und da wurde, warum auch die hinterlegte mailadresse geändert und da der tranfsfer misslamg, wollte ich wissen wann die sperrung endet ?
Ja und da heute freitag ist, wird antwort wohl erst am montag komnen.

Delocalization of Non-Mean-Field Random Matrices in Dimensions $d\ge 3$
Sofiia Dubova, Fan Yang, Horng-Tzer Yau, Jun Yin
https://arxiv.org/abs/2507.20274 https://

Delocalization of Non-Mean-Field Random Matrices in Dimensions $d\ge 3$
Consider an $N \times N$ random band matrix $H = \left(H_{xy}\right)$ with mean-zero complex Gaussian entries, where $x, y$ lie on the discrete torus $(\mathbb{Z} / \sqrt[d]{N} \mathbb{Z})^d$ in dimensions $d \ge 3$. The variance profile $\mathbb{E}\left|H_{xy}\right|^2 = S_{xy}$ vanishes when the distance between $x$ and $y$ exceeds a given bandwidth parameter $W$. We prove that if the bandwidth satisfies $W \geq N^{\mathfrak{c}}$ for some constant $\mathfrak{c} > 0$, then in the lar…

The second order Huang-Yang approximation to the Fermi thermodynamic pressure
Xuwen Chen, Jiahao Wu, Zhifei Zhang
https://arxiv.org/abs/2505.23136 https://…

The second order Huang-Yang approximation to the Fermi thermodynamic pressure
We consider a dilute Fermi gas in the thermodynamic limit with interaction potential scattering length $\mathfrak{a}_0$ at temperature $T>0$. We prove the 2nd order Huang-Yang approximation for the Fermi pressure of the system, in which there is a 2nd order term carrying the positive temperature efffect.Our formula is valid up to the temperature $T<ρ^{\frac{2}{3}+\frac{1}{6}}$, which is, by scaling, also necessary for the Huang-Yang formula to hold. Here, $T_F\simρ^{\frac{2}{3}}$ is the Fermi…

Numerical extraction of crosscap coefficients in microscopic models for (2 1)D conformal field theory
Jia-Ming Dong, Yueshui Zhang, Kai-Wen Huang, Hong-Hao Tu, Ying-Hai Wu
https://arxiv.org/abs/2507.20005

Numerical extraction of crosscap coefficients in microscopic models for (2+1)D conformal field theory
Conformal field theory (CFT) can be placed on disparate space-time manifolds to facilitate investigations of their properties. For (2+1)D theories, one useful choice is the real projective space $\mathbb{RP}^3$ obtained by identifying antipodal points on the boundary sphere of a three-dimensional ball. One-point functions of scalar primary fields on this manifold generally do not vanish and encode the so-called crosscap coefficients. These coefficients also manifest on the sphere as the overlap…

A characterization of endo-commutativity of 3-dimensional curled algebras
Sin-Ei Takahasi, Kiyoshi Shirayanagi
https://arxiv.org/abs/2507.20572 https://arx…

A characterization of endo-commutativity of 3-dimensional curled algebras
A curled algebra is a non-associative algebra in which $x$ and $x^2$ are linearly dependent for every element $x$. An algebra is called endo-commutative, if the square mapping from the algebra to itself preserves multiplication. In this paper, we provide a necessary and sufficient condition for a 3-dimensional curled algebra over an arbitrary field to be endo-commutative, expressed in terms of the properties of its underlying linear basis.

In de Nederlandse politiek kan een kabinet:
1. Missionair zijn;
2. Demissionair zijn;
3. Demissionairder zijn;
4. Het demissionairst zijn*.
* naar verwachting in de komende weken.

One of Southern California assets these days are the Coulson helicopters contracted to live at several airports in Orange, LA and Ventura Counties. At the risk of sounding like an advert, they're amazing.
3,050 gallon capacity (a tad more than a MAFFS C-130), GPS guided dropping, able to reload in 2 minutes while hovering, and full night-dropping ability.
For comparison, that's about triple the load of the Firehawk, and almost double what the CL-415 Super Scooper can de…

"The Fed sees elevated consumer prices and increased inflation ahead as the trade war intensifies. Prior to Trump, the average tariff on stuff coming into America was 2.3%. Now it’s topped 17%, which is the highest since 1934 (a year of intense misery and suffering). Given the ‘deals’ Trump has just made, that rate is set to crest above 19% – the stiffest since 1906. That’s when this guy was president. Nice stash. "
--- Garth Turner

Das schöne am Verreisen sind ja immer die Getränke der Einheimischen 🤣
Flötzinger Spezi seit Jahrzehnten nicht mehr getrunken.
Und von Bazi noch nie was gehört, aber wegen dem lustigen Namen gekauft.
Ob die Geschichte der Spezi Erfindung einem Faktencheck stand hält, wage ich zu bezweifeln
#spezi

Solitons of the Symmetric $\phi^4$-$\phi^2 |\phi|$-$\phi^2$ Triple Well Model
Avinash Khare, Avadh Saxena
https://arxiv.org/abs/2507.19769 https://arxiv.or…

Solitons of the Symmetric $ϕ^4$-$ϕ^2 |ϕ|$-$ϕ^2$ Triple Well Model
A symmetric $ϕ^4$-$ϕ^2 |ϕ|$-$ϕ^2$ model has recently attracted a lot of attention due to its usefulness in studying tunable phase transitions. We analyze the behavior of this model for the entire range of parameters and obtain its kink and pulse solutions. For completeness, we also present several periodic solutions of this model. Furthermore, we present a generalized symmetric $ϕ^{4n}$-$ϕ^{2n}|ϕ|$-$ϕ^2$ model where $n = 1, 2, 3, ...$ and obtain its kink and pulse so…

Toroidal graph manifolds with small homology are not SU(2)-abelian
Giacomo Bascape
https://arxiv.org/abs/2506.21729 https://arxiv.org…

Toroidal graph manifolds with small homology are not SU(2)-abelian
We show that if $Y$ is a toroidal closed graph manifold rational homology $3$-sphere with $|H_1(Y;\mathbb{Z})| \le 5$, then there exists an irreducible representation $\fund{Y} \to SU(2)$. This answers positively to a conjecture by Baldwin and Sivek in the case of graph manifolds.

Same
https://circumstances.run/@ukapala/114931320298481917

NY&NJ Harbor&Tributaries Focus Area Feasibility Study Draft Report was just released.
In it, US Army Core of Engineers looks at seawalls and similar to mitigate coastal storm surge risk in the #NYC metro
Public comment period July 24, 2025 – August 25, 2025
There are 3 spots of actionable items (FY2028 cost, added value):
1) East Harlem (cost $762million, $1.264 billion)
2) East Riser Meadowlands (cost $249million, value added $428 million)
3) Oakwood Beach Staten Island (cost $55million, value added $87 million)
I only know item 1 well enough to comment.
https://www.nan.usace.army.mil/Missions/Civil-Works/Projects-in-New-York/New-York-New-Jersey-Harbor-Tributaries-Focus-Area-Feasibility-Study/
🧵

$1/f^{3/2}$ Power Spectrum at the Phonon Bottleneck
Steven T. Bramwell
https://arxiv.org/abs/2507.19159 https://arxiv.org/pdf/2507.19159

$1/f^{3/2}$ Power Spectrum at the Phonon Bottleneck
The common observation of a `$1/f^α$' power spectrum with $α<2$ constitutes one of the enduring mysteries of condensed matter physics. Here it is shown that a $1/f^α$ power spectrum, with $α= 3/2$, can arise when an ensemble of two--level systems is coupled to a heat bath by means of a system of Bosonic quasiparticles. The model considered is the classic model of Faughnan and Strandberg of the phonon bottleneck, and the anomalous relaxation is associated with an approximate non-equilibrium …

A while ago the media reported that most of the long-distance "suburban" trains between #Wrocław and #Poznań will be discontinued, and instead one will have to change trains midway. Irrespective of whether it's actually going to happen, let's consider it.
As you can probably tell by now, I'm not a stranger to changing trains. In fact, there are some direct connections that I do criticize. For example:
• Poznań — Szczecin — Świnoujście, where arriving at Szczecin Główny and turning back to leave the city is a waste of time. It's better to change trains at Szczecin Dąbie.
• Poznań — Krzyż — Kostrzyn, where instead of using a single railbus, you can use a larger EMU for the Poznań — Krzyż segment, and a smaller DMU for Krzyż — Kostrzyn (in fact, only recently the "direct" Poznań — Kostrzyn train involved just that, but it was supposed to be temporary).
However, good matches are the key. Say:
1. Max 10 minutes (when there are no delays) from one train to the other.
2. "Door-to-door" transfer — without having to carry all your luggage across platforms.
3. Reliable connection — if one train is delayed, the other train waits for it (or there are so many alternatives that it doesn't have to).
Can such a thing happen on Poznań — Wrocław route? I have my doubts.
I've been using these trains for years, and I can say this: there is no effort to match train from/to Poznań with other trains in Wrocław. Sometimes the trains depart 10 minutes before the first train from Poznań arrives, sometimes I need to transfer in 10 minutes, and sometimes I have to wait over an hour. And the same in the other direction.
Perhaps things would actually improve if the route is split. Perhaps people would actually care. Maybe even the trains would be fitted better to the timetable in Wrocław. But I find it hard to believe.
EDIT: One final thought — since there is no real reason to split these connections (except for profiteering), why make travellers' lives harder?
#rail

1/ Watched more #openhouse with C again last night (series 3 episodes 1 and 2). It’s common that only one of the partners in the relationship really wants to be there - and the other is going along with it to people please, and out of fear of losing the other one.
I think the reasons and motivations for going into

WS4 Intense Sun Alert:Heat Index:Sun:1220 W/m^2 #WS4 #STATUS

A Common Origin of Asymmetric Self-interacting Dark Matter and Dirac Leptogenesis
Manoranjan Dutta, Nimmala Narendra
https://arxiv.org/abs/2506.22388 https…

A Common Origin of Asymmetric Self-interacting Dark Matter and Dirac Leptogenesis
Assuming dark matter to be asymmetric as well as self-interacting and neutrinos to be Dirac fermions, we propose a framework to address the observed baryon imbalance of the universe. We add three right-handed neutrinos $ν_{R_i},\,{i=1,2,3}$, one singlet fermion $χ$, a doublet fermion $ψ$, and heavy scalar doublets $η_i,\,{i=1,2}$ to the Standard Model. Both $χ$ and $ψ$ are fermions with non-zero charge under an extended $U(1)_{B-L} \times U(1)_D$ symmetry. Additionally, a $\mathcal{Z}_2$ …

Die neue Nintendo Switch2 ist jetzt seit 3 Wochen auf dem Markt und obwohl sie in der Zeit die erfolgreichste Konsole aller Zeiten ist und inzwischen vermutlich über 5 Mio. verkauft wurden ist sie jetzt lieferbar. Amazon würde sie Morgen verschicken und Mediamarkt bietet einen Lieferung bis zum 08.07.2025 an. Das ist für mich als Logistiker echt beindruckend und sowas schafft sonst nur Apple!
#nintendo

AMD and Stability AI launch the industry's first Stable Diffusion 3.0 Medium AI model optimized for AMD's XDNA 2 NPUs, designed to run locally on Ryzen laptops (Anton Shilov/Tom's Hardware)

AMD unveils industry-first Stable Diffusion 3.0 Medium AI model generator tailored for XDNA 2 NPUs — designed to run locally on Ryzen AI laptops
An offline image generator for XDNA 2 NPUs.

Crosslisted article(s) found for cs.LG. https://arxiv.org/list/cs.LG/new
[2/3]:
- P2C: Path to Counterfactuals
Sopam Dasgupta, Sadaf MD Halim, Joaqu\'in Arias, Elmer Salazar, Gopal Gupta

まだやったことない人は、Tom Clancy’s The Division 2 - Gold Editionが-60%の3,344円で売ってるので、これを書いたまへ。
Division 2の本体と、ダウンロードコンテンツのウォーロードオブニューヨーク、バトルフォーブルックリンがセットになったパッケージである。

Replaced article(s) found for cs.CV. https://arxiv.org/list/cs.CV/new
[2/3]:
- Relative Drawing Identification Complexity is Invariant to Modality in Vision-Language Models
Freitas, H{\aa}vardstun, Ferri, Garigliotti, Telle, Hern\'andez-Orallo

Wer kennt es nicht? 😕

5-regular graphs and the 3-dimensional rigidity matroid
Rebecca Monks, Anthony Nixon
https://arxiv.org/abs/2506.22214 https://arxiv.o…

5-regular graphs and the 3-dimensional rigidity matroid
A bar-joint framework $(G,p)$ in Euclidean $d$-space is rigid if the only edge-length-preserving continuous motions arise from isometries of $\mathbb{R}^d$. In the generic case, rigidity is determined by the generic $d$-dimensional rigidity matroid of $G$. The combinatorial nature of this matroid is well understood when $d=1,2$ but open when $d\geq 3$. Jackson and Jordán 2005 characterised independence in this matroid for connected graphs with minimum degree at most $d+1$ and maximum degree at…

On algebraic vector bundles of rank $2$ over smooth affine fourfolds
Thomas Brazelton, Morgan Opie, Tariq Syed
https://arxiv.org/abs/2507.21029 https://arx…

On algebraic vector bundles of rank $2$ over smooth affine fourfolds
The classification of algebraic vector bundles of rank 2 over smooth affine fourfolds is a notoriously difficult problem. Isomorphism classes of such vector bundles are not uniquely determined by their Chern classes, in contrast to the situation in lower dimensions. Given a smooth affine fourfold over an algebraically closed field of characteristic not equal to $2$ or $3$, we study cohomological criteria for finiteness of the fibers of the Chern class map for rank $2$ bundles. As a consequence,…

Congruences modulo $23$ to $y^2=x^3-23$ are trivial
Elie Studnia
https://arxiv.org/abs/2507.20801 https://arxiv.org/pdf/2507.20801

Congruences modulo $23$ to $y^2=x^3-23$ are trivial
We say that two elliptic curves $E$ and $F$ over $\mathbb{Q}$ are congruent modulo a prime $p$ if their $p$-torsion Galois modules (over the algebraic closure of $\mathbb{Q}$) are isomorphic. Such a congruence is called trivial if there is a rational isogeny between $E$ and $F$ with degree prime to $p$. A version of the Frey-Mazur conjecture states that any congruence modulo any prime $p \geq 19$ is trivial. Given an elliptic curve $E/\mathbb{Q}$ and a prime $p$, it is well-known that there is …

Microscopic origin of the magnetic interactions and their experimental signatures in altermagnetic La$_2$O$_3$Mn$_2$Se$_2$
Laura Garcia-Gassull, Aleksandar Razpopov, Panagiotis Peter Stavropoulos, Igor I Mazin, Roser Valent\'i
https://arxiv.org/abs/2506.21661

Microscopic origin of the magnetic interactions and their experimental signatures in altermagnetic La$_2$O$_3$Mn$_2$Se$_2$
Altermagnets (AM) are a recently introduced type of magnets, with no net magnetization like antiferromagnets, but displaying a non-relativistic Zeeman splitting in reciprocal space like ferromagnets. One of the lately discussed models to realize AM is the inverse Lieb lattice (ILL). Initially suggested as a purely theoretical construct, the ILL occurs in real materials such as La$_2$O$_3$Mn$_2$Se$_2$. However, AM on the ILL requires 90$^\circ$ nearest-neighbor superexchange to be {\it antiferro…

Thread emoji…
“Why I don’t trust WCAG 2.2 and what I’m hoping from 3.0”
https://blog.logrocket.com/ux-design/wcag-3-vs-2-ux/
This is a disappointing read because it fails to recognize *when* WCAG 2 was written and *how* consensus happens. It also assumes…

Why I don’t trust WCAG 2.2 and what I’m hoping from 3.0 - LogRocket Blog
You can follow WCAG 2.2 and still build inaccessible products. Here's what I want from WCAG 3.0.

QED calculations of the $2p$-$2s$ transition energies in Li-like ions
V. A. Yerokhin, Z. Harman, C. H. Keitel
https://arxiv.org/abs/2507.21718 https://arxiv.org/pdf/2507.21718 https://arxiv.org/html/2507.21718
arXiv:2507.21718v1 Announce Type: new
Abstract: Systematic QED calculations of ionization energies of the $2s$, $2p_{1/2}$, and $2p_{3/2}$ states, as well as the $2p_{1/2}$--$2s$ and $2p_{3/2}$--$2p_{1/2}$ transition energies are performed for Li-like ions with the nuclear charge numbers $Z = 10$--$100$. The convergence of QED perturbative expansion is improved by using the extended Furry picture, which starts from the Dirac equation with a local screening potential. An ab initio treatment is accomplished for one- and two-photon electron-structure QED effects and the one-photon screening of the self-energy and vacuum-polarization corrections. This is complemented with an approximate treatment of the two-photon QED screening and higher-order (three or more photon) electron-structure effects. As a result, the obtained theoretical predictions improve upon the accuracy achieved in previous calculations. Comparison with available experimental data shows a good agreement between theory and experiment. In most cases, the theoretical values surpass the experimental results in precision, with only a few exceptions. In the case of uranium and bismuth, the comparison provides one of the most stringent tests of bound-state QED in the strong-field regime. Alternatively, the obtained results can be employed for high-precision determinations of nuclear charge radii.
toXiv_bot_toot

Differentiation of Site-Specific Symmetry Breaking Orders in Y$_{1-x}$Pr$_x$Ba$_2$Cu$_3$O$_{6 y}$
L. Martinelli, S. R\"udiger, I. Bialo, J. Oppliger, F. Igoa Saldana, M. v. Zimmermann, E. Weschke, R. Arpaia, J. Chang
https://arxiv.org/abs/2507.20640

Differentiation of Site-Specific Symmetry Breaking Orders in Y$_{1-x}$Pr$_x$Ba$_2$Cu$_3$O$_{6+y}$
Solid matter is classified through symmetry of ordering phenomena. Experimentally, this approach is straightforward, except when distinct orderings occur with identical or almost identical symmetry breaking. Here we show that the cuprate system Y$_{1-x}$Pr$_x$Ba$_2$Cu$_3$O$_{6+y}$ hosts two distinct orderings with almost identical translational symmetry breaking. Only when applying site-sensitive resonant elastic x-ray scattering (REXS), charge ordering can be conclusively differentiated from a…

#ciddle 4
1. ❌ ↖️ 13826km
2. ❌ ⬅️ 12921km
3. ❌ ↖️ 11917km
4. ❌ ↖️ 12781km
5. ❌ ∗️ 5736km
6. ❌ ↖️ 6810km
https://ciddle.winklerweb.net

#pastpuzzle 326
🟩🟩🟩🟥 ( 5)
🟩🟩🟩🟥 ( 2)
🟩🟩🟩🟩 (0)
▪️▪️▪️▪️
3/4 🥉
https://www.pastpuzzle.de

Global regularity and incompressible limit of 2D compressible Navier-Stokes equations with large bulk viscosity
Shengquan Liu, Jianwen Zhang
https://arxiv.org/abs/2506.22235

Global regularity and incompressible limit of 2D compressible Navier-Stokes equations with large bulk viscosity
In this paper, we study the global regularity of large solutions with vacuum to the two-dimensional compressible Navier-Stokes equations on $\mathbb{T}^{2}=\mathbb{R}^{2}/\mathbb{Z}^{2}$, when the volume (bulk) viscosity coefficient $ν$ is sufficiently large. It firstly fixes a flaw in [10, Proposition 3.3], which concerns the $ν$-independent global $t$-weighted estimates of the solutions. Amending the proof requires non-trivially mathematical analysis. As a by-product, the incompressible lim…

Coclass of the second 3-class group
Siham Aouissi, Daniel C. Mayer
https://arxiv.org/abs/2508.17510 https://arxiv.org/pdf/2508.17510

Coclass of the second 3-class group
By means of parametrized presentations of finite metabelian 3-groups, it is proved that the coclass cc(M) of the second 3-class group M=Gal(F_3^2(K)/K) of any algebraic number field K with elementary bicyclic 3-class group Cl_3(K)=(3,3) is determined unambiguously by the second largest order ord(Cl_3(E_2))=3^{cc(M)+1} among the four 3-class groups of the unramified cyclic cubic extensions E_i (i=1,..,4) of K. Minimal discriminants of quadratic and cubic fields K with assigned coclass cc(M) are …

Largest planar graphs of diameter $3$ and fixed maximum degree -- connection with fractional matchings
Antoine Dailly, Sasha Darmon, Ugo Giocanti, Claire Hilaire, Petru Valicov
https://arxiv.org/abs/2507.18797

Largest planar graphs of diameter $3$ and fixed maximum degree -- connection with fractional matchings
The degree diameter problem asks for the maximum possible number of vertices in a graph of maximum degree $Δ$ and diameter $D$. In this paper, we focus on planar graphs of diameter $3$. Fellows, Hell and Seyffarth (1995) proved that for all $Δ\geq 8$, the maximum number $\mathrm{np}_{Δ, D}$ of vertices of a planar graph with maximum degree at most $Δ$ and diameter at most 3 satisfies $\frac{9}{2}Δ- 3 \leq \mathrm{np}_{Δ,3} \leq 8 Δ+ 12$. We show that the lower bound they gave is optimal,…

Is ozone a reliable proxy for molecular oxygen? III. The impact of CH$_4$ on the O$_2$-O$_3$ relationship for Earth-like atmospheres
Thea Kozakis, Jo\~ao M. Mendon\c{c}a, Lars A. Buchhave, Luisa M. Lara
https://arxiv.org/abs/2508.19062

Is ozone a reliable proxy for molecular oxygen? III. The impact of CH$_4$ on the O$_2$-O$_3$ relationship for Earth-like atmospheres
In the search for life in the Universe, molecular oxygen (O$_2$) combined with a reducing species, such as methane (CH$_4$), is considered a promising disequilibrium biosignature. In cases where it would be difficult or impossible to detect O$_2$ (e.g., mid-IR or low O$_2$ levels), it has been suggested that ozone (O$_3$), the photochemical product of O$_2$, could be used as a proxy for determining the abundance of O$_2$. As the O$_2$-O$_3$ relationship is nonlinear, the goal of this series of …

Giants WR Jalin Hyatt on transforming body to rebound after dismal Year 2: ‘That’s what darkness does to you’ https://www.nfl.com/news/giants-wr-jalin-hyatt-on-transforming-body-to-rebound-after-dismal-y…

Self-shrinkers with any number of ends in $\mathbb{R}^{3}$ by stacking $\mathbb{R}^{2}$
Guanhua Shao, Jiahua Zou
https://arxiv.org/abs/2507.18825 https://a…

Self-shrinkers with any number of ends in $\mathbb{R}^{3}$ by stacking $\mathbb{R}^{2}$
For each half-integer $J$ and large enough integer $m$ we construct by PDE gluing methods a self-shrinker $\breve{M}[J,m]$ with $2J+1$ ends and genus $2J(m-1)$. $\breve{M}[J,m]$ resembles the stacking of $2J+1$ levels of the plane $\mathbb{R}^2$ in $\mathbb{R}^3$ that have been connected by $2Jm$ catenoidal bridges with $m$ bridges connecting each pair of adjacent levels. It observes the symmetry of an $m$-gonal prism (when $J$ is a half integer) or an $m$-gonal antiprism (when $J$ is an intege…

3 Ways FaceBook Can Kill Your Creativity
#creativity #inspiration
https://muz4now…

3 Ways FaceBook Can Kill Your Creativity
Stan Stewart - @muz4now

Infinite towers of 2d symmetry algebras from Carrollian limit of 3d CFT
Leonardo Pipolo de Gioia, Ana-Maria Raclariu
https://arxiv.org/abs/2508.19981 https://

Infinite towers of 2d symmetry algebras from Carrollian limit of 3d CFT
We consider the Carrollian limit of OPE blocks of scalar primaries, spin-1 currents and the stress tensor in 3-dimensional conformal field theory (CFT$_3$). We demonstrate that these OPE blocks decompose into OPE blocks of towers of $\mathfrak{sl}(2,\mathbb{C})$ modes labeled by negative integer dimensions. We present two applications of this construction. We first show that the current-scalar-scalar and stress tensor-scalar-scalar OPE blocks in CFT$_3$ reduce to $\mathfrak{sl}(2,\mathbb{C})$ O…

Hamilton cycles in regular graphs perturbed by a random 2-factor
Cicely Henderson, Sean Longbrake, Dingjia Mao, Patryk Morawski
https://arxiv.org/abs/2506.21756

Hamilton cycles in regular graphs perturbed by a random 2-factor
In this paper, we prove that for each $d \ge 3$, the union of a $d$-regular graph with a uniformly random $2$-factor on the same vertex set is Hamiltonian with high probability. This resolves a conjecture by Draganić and Keevash for all values of $d$ but $d=2$.

Local Wellposedness and Global Weak Solutions of the Pauli-Darwin/Poisswell Equations
Pierre Germain, Norbert J. Mauser, Jakob M\"oller
https://arxiv.org/abs/2506.22333

Local Wellposedness and Global Weak Solutions of the Pauli-Darwin/Poisswell Equations
We construct local (in time) strong solutions in $H^s(\mathbb{R}^3)$, $s>3/2$ and global weak solutions with finite energy for the Pauli-Darwin equation and the Pauli-Poisswell equation. These are the first rigorous results on these two models, which couple a 2-spinor with an electromagnetic field. The proofs rely on energy estimates for the strong solutions and compactness with an appropriate regularization for the weak solutions.

#ciddle 3
1. ❌ ∗️ 17km
2. ❌ ⬇️ 53km
3. ❌ ↘️ 39km
4. ❌ ➡️ 11km
5. ✅
https://ciddle.winklerweb.net

On the codimension 1 PGL(3) orbit closures in $\text{Gr}(3,6)$
Tanav Choudhary
https://arxiv.org/abs/2507.18608 https://arxiv.org/pdf/2507.18608

On the codimension 1 PGL(3) orbit closures in $\text{Gr}(3,6)$
The projective linear group $\text{PGL}(3)$ naturally acts on the Grassmannian $\text{Gr}(3, V_2)$ of $3$-dimensional subspaces of the vector space $V_2$ of homogeneous conics in 3 variables. It was proved by Abdallah, Emsalem and Iarrobino in 2021 that this action has a one-parameter family of orbits along with 14 special orbits. The codimension 1 orbits of this action consist of the entire one-parameter family of orbits, along with 2 of the 14 special orbits. In this paper, we calculate the c…

This https://arxiv.org/abs/2503.18128 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

A cometary Fluorescence Model for the $ν_3$ Vibrational Band of Cyanogen
Cyanogen (\ce{C_2N_2}) is suspected for a long time to be present in comets and to contribute to the creation of CN radical. So far no observations with ground-based facilities managed to detect this species but the Rosetta mission, thanks to in situ observations with the ROSINA mass spectrometer detected this species in the coma of 67P/Churyumov-Gerasimenko. To investigate its presence from infrared spectra in other comets, we developed a fluorescence model for the $ν_3$ fundamental band. Fro…

Emergent Quasiparticles \& Field-Tuned RIXS Spectra in a Trimerized Spin-1/2 Chain
Subhajyoti Pal, Pradeep Thakur, Ashis Kumar Nandy, Anamitra Mukherjee
https://arxiv.org/abs/2505.23208

Emergent Quasiparticles \& Field-Tuned RIXS Spectra in a Trimerized Spin-1/2 Chain
We investigate spin-flip excitations in the spin-1/2 trimer chain $\rm{Cu_3(P_2O_6OH)_2}$, featuring an antiferromagnetic exchange motif $J_1$-$J_1$-$J_2$ with $J_1 < J_2$. Using density matrix renormalization group (DMRG) simulations, we demonstrate that single-spin-flip processes induced by resonant inelastic X-ray scattering (RIXS) generate emergent gapless modes governed by the underlying trimer periodicity alongside distinct high-energy excitations. By combining exact diagonalization and r…

Multiple sign-changing and semi-nodal normalized solutions for a Gross-Pitaevskii type system on bounded domain: the $L^2$-supercritical case
Tianhao Liu, Linjie Song, Qiaoran Wu, Wenming Zou
https://arxiv.org/abs/2506.22152

Multiple sign-changing and semi-nodal normalized solutions for a Gross-Pitaevskii type system on bounded domain: the $L^2$-supercritical case
In this paper we investigate the existence of multiple sign-changing and semi-nodal normalized solutions for an $m$-coupled elliptic system of the Gross-Pitaevskii type: \begin{equation} \left\{ \begin{aligned} &-Δu_j + λ_j u_j = \sum_{k=1 }^mβ_{kj} u_k^2 u_j, \quad u_j \in H_0^1(Ω), &\int_Ωu_j^2dx = c_j, \quad j = 1,2,\cdots,m. \end{aligned} \right. \end{equation} Here, $Ω\subset \mathbb{R}^N$ ($N = 3,4$) is a bounded domain. The constants $β_{kj} \neq 0$ and $c_j > 0$…

Cycles of Length 4 or 8 in Graphs with Diameter 2 and Minimum Degree at Least 3
Avery Carr
https://arxiv.org/abs/2508.19302 https://arxiv.org/pdf/2508.1930…

Cycles of Length 4 or 8 in Graphs with Diameter 2 and Minimum Degree at Least 3
In this short note it is shown that every graph of diameter 2 and minimum degree at least 3 contains a cycle of length 4 or 8. This result contributes to the study of the Erdős--Gyárfás Conjecture.

Enumeration of geometric Weierstrass points of metric graphs
Diego A. Robayo Bargans
https://arxiv.org/abs/2506.22130 https://arxiv.o…

Enumeration of geometric Weierstrass points of metric graphs
A classical result states that on a smooth algebraic curve of genus $g$ the number of Weierstrass points, counted with multiplicity, is $g^3-g$. In this paper, we introduce the notion of geometric Weierstrass points of metric graphs and show that a generic metric graph of genus $g$ has $g^3-g$ geometric Weierstrass points counted with multiplicity. Our methods also provide a new proof of the existence of Weierstrass points on metric graphs of genus bigger than or equal to $2$.

Solid bricks that every $b$-invariant edge is solitary
Yipei Zhang, Xiumei Wang
https://arxiv.org/abs/2507.21565 https://arxiv.org/pdf/2507.21565

Solid bricks that every $b$-invariant edge is solitary
A graph $G$ is a brick if it is 3-connected and $G-\{u,v\}$ has a perfect matching for any two distinct vertices $u$ and $v$ of $G$. A brick $G$ is solid if for any two vertex disjoint odd cycles $C_1$ and $C_2$ of $G$, $G-(V(C_1)\cup V(C_2))$ has no perfect matching. Lucchesi and Murty proposed a problem concerning the characterization of bricks, distinct from $K_4$, $\overline{C_6}$ and the Petersen graph, in which every $b$-invariant edge is solitary. In this paper, we show that for a solid …