Tootfinder

Second-order methods for provably escaping strict saddle points in composite nonconvex and nonsmooth optimization
Alexander Bodard, Masoud Ahookhosh, Panagiotis Patrinos
https://arxiv.org/abs/2506.22332

Second-order methods for provably escaping strict saddle points in composite nonconvex and nonsmooth optimization
This study introduces two second-order methods designed to provably avoid saddle points in composite nonconvex optimization problems: (i) a nonsmooth trust-region method and (ii) a curvilinear linesearch method. These developments are grounded in the forward-backward envelope (FBE), for which we analyze the local second-order differentiability around critical points and establish a novel equivalence between its second-order stationary points and those of the original objective. We show that the…

Raiders take care of their own by hosting second annual Alumni Wellness Weekend https://www.raiders.com/news/raiders-second-annual-alumni-wellness-weekend-nfl

The Second-Class Citizenship of Palestinian Israelis https://jacobin.com/2025/05/palestinian-israelis-apartheid-discrimination-segregation/

The Second-Class Citizenship of Palestinian Israelis
Horrific, genocidal atrocities are being carried out against Palestinians in Gaza right now. But Israeli historian Ilan Pappé explains that Palestinian Israelis also find themselves in an “apartheid state” inside Israel.

Texans CB Damon Arnette took 'look in the mirror,' feels he's made 'complete turnaround' before second chance in NFL https://www.nfl.com/news/texans-cb-damon-arnette-took-look-in…

I can confirm the it is indeed too warm.
'Unprecedented' alerts in France as blistering heat grips Europe
https://www.bbc.com/news/articles/c5y7781e915o
> Dozens of the country's mainland regions are currently under the second-highest alert as…

'Unprecedented' alerts in France as blistering heat grips Europe
Dozens of the country's mainland regions are currently under the second-highest alert as the heatwave continues.

(Excuse the bad word usage) 🫣

baseball: Baseball steroid use (2008)
Two networks representing steroid use among baseball players. First, a bipartite network of players and their steroid providers (of illegal performance-enhancing substances). Second, a one-mode projection of players, which are linked if they have a common supplier.
This network has 84 nodes and 84 edges.
Tags: Social, Offline, Weighted, Projection

What do the #Trump|ist factions of capital want? Can that be squared with the interests of the #MAGA base? Capable state managers could potentially thread the needle, but that's all gone. Benjamin Braun and Cédric Durand about the US ruling class taking the reins to manage its own decline.

From the second I went outside 5 hours ago, I've been non-stop sneezing.
NON STOP!
The novelty wore off 4:55 ago

In April Todd Lyons,
the acting director of Immigration and Customs Enforcement (ice),
lamented that it takes too long to deport illegal immigrants.
At the Border Security Expo in Phoenix he told a crowd of startup bosses vying for government contracts that a better deportation system would function more like Amazon, the tech giant whose delivery drivers zigzag the country at record speed.
“Like Prime, but with human beings,” he said.

America’s immigration detention centres are at capacity
A visit to the second biggest, in Georgia, shows what that looks like

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…

This https://arxiv.org/abs/2503.06207 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Transport and response coefficients in second-order dissipative relativistic hydrodynamics with quantum corrections: probing the quark-gluon plasma
A functional measure encompasses quantum corrections and is explored in the fluid/gravity correspondence. Corrections to response and transport coefficients in the second-order dissipative relativistic hydrodynamics are proposed, including the ones to the pressure, the relaxation time, and the shear relaxation. Their dependence on the quark-gluon plasma (QGP) temperature sets a temperature dependence on the running parameter encoding the one-loop quantum gravity correction, driven by a function…

#Worldrecord: 1 million GB per sec #internet speed achieved by #Japan over 1,100 miles

Japan sends 1 million GB of data across 1,100 miles in a second
Current data transfer speeds aren’t enough to support AI, VR, IoT, and various other emerging technologies. Here’s a mindblowing solution.

Today's solar activity - #Sun

Since I could translate the symbols, I can now see them in gdb as well (extended with gef here). When I run QEMU, it uses the Multiboot header, but that's no issue.
In gdb, I had to
- `target remote localhost:1234`
- `add-symbol-file ./9pc64.aout.elf 0xffffffff80110000`
The second part is crucial for relocating the symbols, since we'll be long mode.
Anyway, enjoy symbols!!! \o/

📣 Another great milestone for the #GÉANT project!
The GN5-1 project has successfully completed its final review by the European Commission—recognising strong performance, technical achievements, and commitment to innovation and sustainability, all aligned with the Horizon Europe programme’s goals.
👏 A big thank you to all contributors involved. Your dedication continues to drive our …

GÉANT’s GN5-1 Project completes another successful EC Review | GÉANT CONNECT Online
GÉANT’s GN5-1 project has successfully completed the Period 2 review by the European Commission (EC), marking another key milestone in the project’s continued delivery of cutting-edge networking and collaboration services to Europe’s research and education community. The review, which took place at the end of March 2025, covered the second reporting period of the project.

A more interesting question, perhaps: 
why are so many people obeying these circumventions of proper lawmaking?
https://www.nytimes.com/video/us/politics/100000010128290/why-trump-is-signing-so-many-e…

"""
The barbarian role of cultural demolition crew is especially important when you consider how often cultural reconstruction is needed. Many of Rome’s glaring defects — exploitation, authoritarianism, corrupt self-aggrandizement — flow from deeply human tendencies. Time and again they’ve transformed promising civilizations into decaying, oppressive monstrosities. Time and again, history seems to cry out: Bring on the demolition crew! And time and again barbarians cheerfully respond to the call. Their previous massive wreaking of destruction, near the end of the second millennium B.C., had come after civilization went through centuries of apparent ossification.
In a way, barbarians are just a special case of that general and potent zero-sum dynamic in cultural evolution: brutal competition among neighboring societies. This rivalry renders ossified cultures vulnerable to a makeover, minor or major. They may be taken over by a vast neighboring civilization, which will revamp them in its image. Or they may be infiltrated and perhaps even disassembled by barbarians, paving the way for future reassembly. Or they may revive and prevail — an example of the “challenge and response” dynamic stressed by Arnold Toynbee. In any event, the point remains the same: however deeply human the tendencies of exploitation, authoritarianism, and self-aggrandizement, cultures that surrender to them may not be long for this world.
"""
(Robert Wright, Nonzero: The Logic of Human Destiny)
Is it time for the barbarians now? Or perhaps we — here on Fedi — are the barbarians.

Shows what I know:
I complain about the first half xG from open play. #USMNT immediately scores from open play at the start of the second half.
I say Navas > Freese in PKs. Freese stands on his head and is dominant. To be fair, Navas was excellent too.
Let me tell you this: US will bounce out of the semifinals. 😉 🤫

the year is 2025 there are TWO (2) types of videos on YouTube: adults obsessing over kids movies (8 hour long video essay) & political analysis (30 second infotainment)

Orientation dynamics of a spheroid in the simple shear flow of a weakly elastic fluid
Pavan Kumar Singeetham, Deepak Madival, Piyush Garg, Ganesh Subramanian
https://arxiv.org/abs/2505.23361

Orientation dynamics of a spheroid in the simple shear flow of a weakly elastic fluid
We investigate the orientation dynamics of a neutrally buoyant spheroid, of an arbitrary aspect ratio ($κ$), freely rotating in a weakly viscoelastic fluid undergoing simple shear flow. Weak elasticity is characterized by a small but finite Deborah number ($De$), and the suspending fluid rheology is therefore modeled as a second-order fluid, with the constitutive equation involving a material parameter $ε$ related to the ratio of the first and second normal stress differences; polymer solutio…

Signatures of rigidity and second sound in dipolar supersolids
G. A. Bougas, T. Bland, H. R. Sadeghpour, S. I. Mistakidis
https://arxiv.org/abs/2506.22290 …

Signatures of rigidity and second sound in dipolar supersolids
We propose a dynamical protocol to probe the rigidity and phase coherence of dipolar supersolids by merging initially separated fragments in quasi-one-dimensional (1D) double-well potentials. Simulations based on the extended Gross-Pitaevskii equation reveal distinct dynamical signatures across phases. Supersolids exhibit damped crystal oscillations following barrier removal, with the damping rate reflecting superfluid connectivity. A phase-imprinted jump additionally triggers metastable dark s…

#Uber
https://www.theguardian.com/technology/2025/jun/25/second-study-finds-uber-us…

#Uber
https://www.theguardian.com/technology/2025/jun/25/second-study-finds-uber-us…

EQT agrees to sell Japanese automotive electronics manufacturer Pioneer for $1.1B to CarUX, a unit of Taiwan-listed Innolux specializing in smart cockpit tech (Cathy Chan/Bloomberg)
https://www.bloomberg.com/news/articles/20

baseball: Baseball steroid use (2008)
Two networks representing steroid use among baseball players. First, a bipartite network of players and their steroid providers (of illegal performance-enhancing substances). Second, a one-mode projection of players, which are linked if they have a common supplier.
This network has 84 nodes and 84 edges.
Tags: Social, Offline, Weighted, Projection

This https://arxiv.org/abs/2505.03551 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

From Mass-Shell Factorisation to Spin: An Attempt at a Matrix-Valued Liouville Framework for Relativistic Classical and Quantum Phase-Spacetime
While Liouville's theorem is first-order in time for the phase-space distribution itself, the relativistic mass-shell constraint $p^μp_μ= m^2$ is naively second-order in energy. We argue that it is reasonable to unify both energy branches within a single Hamiltonian by factorizing $(p^2 - m^2)$ in analogy with Dirac's approach in relativistic quantum mechanics. We show the resulting matrix-based Liouville equation remains first order and naturally yields a $4\times4$ matrix-valued probability…

Dallas Cowboys quarterback Dak Prescott shares exciting life update https://www.si.com/nfl/cowboys/news/dallas-cowboys-quarterback-dak-prescott-shares-exciting-life-update

Microsoft put their half-assed AI assistant into fucking Notepad?!?!?
On second thought, that's probably just it's speed...

The Trump administration deported a 31-year-old Salvadoran man minutes after a federal appeals court barred his removal while his case proceeded, the government admitted in a court filing this week.
In its filing, the government denied that it had violated the order from the U.S. Court of Appeals for the Second Circuit, in New York, instead blaming “a confluence of administrative errors.”
The government had previously given the court what the judges called “express assurance” that…

Trump Officials Deported Another Man Despite Court Order
A federal appeals panel ordered officials not to deport a 31-year-old to El Salvador. Minutes later, it happened anyway. The government blamed “administrative errors.”

James Jani is one of the best serious YouTubers out there and he burned out. So far, so common.
What I find interesting is something what he says that doesn’t resonate with me at all: “you gotta enjoy the process”
For me, I’ve NEVER enjoyed the process of creating ANYTHING.
I always:
1. wanted something to exist (sometimes out of spite 😇),
2. hated every second of making it happen,
3. enjoyed that it exists.
Guess there’re 2 types of creators. 😅
…

Oregon becomes second state to ban sale of precise geolocation data https://therecord.media/oregon-passes-geolocation-kids-data-bill

Broadband nonlinear optical microresonator array for topological second harmonic generation
Ruoyu Wang, Yiming Pan, Xiaoqin Shen
https://arxiv.org/abs/2506.21388

Broadband nonlinear optical microresonator array for topological second harmonic generation
Topological photonics enables robust light manipulation with third-order optical nonlinearity, yet integrating second-order optical nonlinearity into a topological system faces fundamental challenges: frequency-dependent topological bandgaps impede simultaneous edge states for pump and second harmonic photons at an octave. Here we present a broadband topological nonlinear photonic system via dual frequency topological bandgap engineering in a 2D nonlinear microresonator array. By designing a sq…

Want to learn how to work with children and families in museums? Our new student gallery teacher program, geared to second- and third-year undergraduate students and to graduate students at the #UniversityOfGeorgia kicks off this fall semester.

PentaRAG: Large-Scale Intelligent Knowledge Retrieval for Enterprise LLM Applications
Abu Hanif Muhammad Syarubany, Chang Dong Yoo
https://arxiv.org/abs/2506.21593

PentaRAG: Large-Scale Intelligent Knowledge Retrieval for Enterprise LLM Applications
Enterprise deployments of large-language model (LLM) demand continuously changing document collections with sub-second latency and predictable GPU cost requirements that classical Retrieval-Augmented Generation (RAG) pipelines only partially satisfy. We present PentaRAG, a five-layer module that routes each query through two instant caches (fixed key-value and semantic), a memory-recall mode that exploits the LLM's own weights, an adaptive session memory, and a conventional retrieval-augmentati…

This https://arxiv.org/abs/2502.02389 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csIT_…

Rate-reliability tradeoff for deterministic identification
We investigate deterministic identification over arbitrary memoryless channels under the constraint that the error probabilities of first and second kind are exponentially small in the block length $n$, controlled by reliability exponents $E_1,E_2 \geq 0$. In contrast to the regime of slowly vanishing errors, where the identifiable message length scales linearithmically as $Θ(n\log n)$, here we find that for positive exponents linear scaling is restored, now with a rate that is a function of t…

"The big problem is 'bottlenecks' that make it harder to produce housing, expand energy production, or build new roads and bridges."
vs.
"The big problem is that big corporations have way too much power over our economy and our government."
By 12pts all voters and by 42pts Dem voters prefer the second statement. They're right!

Poll: Democratic voters prefer "populism" over "abundance"
Democrats are asking themselves some hard questions as they ponder how they lost the 2024 election.

This https://arxiv.org/abs/2505.18893 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csCY_…

Reality Check: A New Evaluation Ecosystem Is Necessary to Understand AI's Real World Effects
Conventional AI evaluation approaches concentrated within the AI stack exhibit systemic limitations for exploring, navigating and resolving the human and societal factors that play out in real world deployment such as in education, finance, healthcare, and employment sectors. AI capability evaluations can capture detail about first-order effects, such as whether immediate system outputs are accurate, or contain toxic, biased or stereotypical content, but AI's second-order effects, i.e. any long…

It's only Thursday morning and I've already had what's probably the most intense and productive week of writing since the home-stretch of my dissertation almost 15 years ago.
I basically wrote the entire first draft - and not a super drafty draft, at that - of what I'm thinking will be the second chapter in my next book.
I'm feeling great.
#AmWriting

from my link log —
MySQL transactions per second vs fsyncs per second.
https://sirupsen.com/napkin/problem-10-mysql-transactions-per-second
saved 2025-03-21

This https://arxiv.org/abs/2407.14485 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csGT_…

On Sybil-proof Mechanisms
We show that in the single-parameter mechanism design environment, the only non-wasteful, symmetric, incentive compatible and Sybil-proof direct mechanism is a second price auction with symmetric tie-breaking. Thus, if there is private information, lotteries or other mechanisms that do not always allocate to a highest-value bidder are not Sybil-proof or not incentive compatible. Moreover, we show that our main (im)possibility result extends beyond linear valuations, but not to multi-unit object…

Can anyone here help explain the "status of a #Slovak living abroad"?
It is available to a) citizens and b) descendants of citizens. I understand the purpose of the status for the second group. But why would a Slovak citizen need the status document?

Sun Jingguo:
"The cost of driving a petrol car is too expensive. I save money driving an electric vehicle,"
Lu Yunfeng: "I drive an electric vehicle because I am poor,"
https://www.bbc.com/news/articles/c2d5ld8y8pwo

System Identification for Virtual Sensor-Based Model Predictive Control: Application to a 2-DoF Direct-Drive Robotic Arm
Kosei Tsuji, Ichiro Maruta, Kenji Fujimoto, Tomoyuki Maeda, Yoshihisa Tamase, Tsukasa Shinohara
https://arxiv.org/abs/2505.23138

System Identification for Virtual Sensor-Based Model Predictive Control: Application to a 2-DoF Direct-Drive Robotic Arm
Nonlinear Model Predictive Control (NMPC) offers a powerful approach for controlling complex nonlinear systems, yet faces two key challenges. First, accurately modeling nonlinear dynamics remains difficult. Second, variables directly related to control objectives often cannot be directly measured during operation. Although high-cost sensors can acquire these variables during model development, their use in practical deployment is typically infeasible. To overcome these limitations, we propose a…

Role of long-range dipolar interactions in the simulation of the properties of polar crystals using effective atomic potentials
Miao Yu, Fernando G\'omez-Ortiz, Louis Bastogne, Jin-Zhu Zhao, Philippe Ghosez
https://arxiv.org/abs/2506.22337

Role of long-range dipolar interactions in the simulation of the properties of polar crystals using effective atomic potentials
Driven by novel approaches and computational techniques, second-principles atomic potentials are nowadays at the forefront of computational materials science, enabling large-scale simulations of material properties with near-first-principles accuracy. However, their application to polar materials can be challenging, particularly when longitudinal-optical phonon modes are active on the material, as accurately modeling such systems requires incorporating the long-range part of the dipole-dipole i…

Initial Luminally Deposited FGF4 Critically Influences Blastocyst Patterning
Michael A. Ramirez-Sierra, Thomas R. Sokolowski
https://arxiv.org/abs/2505.23650

Initial Luminally Deposited FGF4 Critically Influences Blastocyst Patterning
Luminogenesis, the formation of a fluid-filled cavity (lumen), is an essential process in early mammalian embryonic development, coinciding with the second cell-fate decision that differentiates the inner-cell-mass (ICM) into epiblast (EPI) and primitive endoderm (PRE) tissues. Based on experiments, the blastocyst lumen is hypothesized to influence EPI-PRE tissue specification, but its particular functional role remains theoretically underexplored. In this study, we extended our stochastic ICM …

Session grid for the second day #accde25

Revisiting Coincident GR in Internal STEGR Formulation
Kyosuke Tomonari, Taishi Katsuragawa, Shin'ichi Nojiri
https://arxiv.org/abs/2506.22158 https://…

Revisiting Coincident GR in Internal STEGR Formulation
We revisit Coincident General Relativity (CGR) in the gauge approach to gravity based on Symmetric Teleparallel Equivalent to General Relativity (STEGR) in the {\it internal-space formulation}, which one of the authors recently proposed in Ref.~[J. Math. Phys. 66 (2025) 5, 052505]. First, we review the standard formulation of STEGR theories in the Palatini approach to gravity, in which formulation we impose the teleparallel and torsion-free conditions by using Lagrange multipliers. Second, we i…

sp_infectious: Art exhibit dynamic contacts (2011)
This dataset contains the daily dynamic contact networks collected during the Infectious SocioPatterns event that took place at the Science Gallery in Dublin, Ireland, during the artscience exhibition INFECTIOUS: STAY AWAY. Each file in the downloadable package contains a tab-separated list representing the active contacts during 20-second intervals of one day of data collection. Each line has the form “t i j“, where i and j are the a…

Super busy week, but here's some #FootpathFriday for you (from our amazing sunset solstice hike last Saturday), along a ridge which is part of the DE/AT borderline... 😍
#LandscapePhotography

Second-order corrections of orders $m\alpha^6$ and $m\alpha^6(m/M)$ to the spin-averaged energy in the HD$^ $ and H$_2^ $ ions
Vladimir I. Korobov, Jean-Philippe Karr, Zhen-Xiang Zhong
https://arxiv.org/abs/2506.22164

Cowboys' Dak Prescott and fiancée Sarah Jane Ramos welcome new daughter https://www.espn.com/nfl/story/_/id/45407111/dak-prescott-dallas-cowboys-sarah-jane-ramos-baby-announcement

Macht Sinn, oder was meint ihr? 🤔
https://chaos.social/@svenrudloff/114587482852878741

This https://arxiv.org/abs/2503.01879 has been replaced.
link: https://scholar.google.com/scholar?q=a

Nexus: An Omni-Perceptive And -Interactive Model for Language, Audio, And Vision
This work proposes an industry-level omni-modal large language model (LLM) pipeline that integrates auditory, visual, and linguistic modalities to overcome challenges such as limited tri-modal datasets, high computational costs, and complex feature alignments. Our pipeline consists of three main components: First, a modular framework enabling flexible configuration of various encoder-LLM-decoder architectures. Second, a lightweight training strategy that pre-trains audio-language alignment on t…

This https://arxiv.org/abs/2211.00694 has been replaced.
link: https://scholar.google.com/scholar?q=a

What we talk about when we talk about physics problem solving
I am a second-year cognitive science major, and as a student who has completed my physical science distributive requirements, I will likely never again come across Gauss's law. So why do I feel that the time and effort I devoted to solving Gauss's law problems was worth it? Partly, I inherently enjoy the learning process and the new perspective on the physical world I have acquired by understanding electromagnetism. But I was also inspired by the ways in which physics problems train the mind in…

"Sea level rise expected to accelerate even if warming is limited to 1.5C: Study"
#Climate #ClimateChange
https://

Sea level rise expected to accelerate even if warming is limited to 1.5C: Study
Rising seas will severely test humanity's resilience in the second half of the 21st century and beyond, even if nations defy the odds and cap global warming at the ambitious 1.5 degrees Celsius target, researchers said Tuesday.

Brunn-Minkowski and Reverse Isoperimetric Inequalities for Dual Quermassintegrals
Shay Sadovsky, Gaoyong Zhang
https://arxiv.org/abs/2505.23748 https://

Brunn-Minkowski and Reverse Isoperimetric Inequalities for Dual Quermassintegrals
This paper establishes two new geometric inequalities in the dual Brunn-Minkowski theory. The first, originally conjectured by Lutwak, is the Brunn-Minkowski inequality for dual quermassintegrals of origin-symmetric convex bodies. The second, generalizing Ball's volume ratio inequality, is a reverse isoperimetric inequality: among all origin-symmetric convex bodies in John's position, the cube maximizes the dual quermassintegrals.

This https://arxiv.org/abs/2409.02236 has been replaced.
initial toot: https://mastoxiv.page/@a…

Umklapp-driven first-order transition into a charge-density wave phase
Using phenomenological Landau free energy, we systematically analyze influence of so-called umklapp contributions on the phase diagram of a solid hosting a commensurate charge-density wave phase. The umklapp terms may change the transition into the ordered state from continuous (second-order) to discontinuous (first-order). Additional elements, such as critical and tricritical points, emerge on the phase diagram under suitable conditions. The proposed mechanism is generalized for the case of ne…

The challenge of HEPA filters in the classrooms.
h/t @…
source: https://xcancel.com/kadamssl/status/1938267359233429683#m

"Le Monde – Plus de 1 500 scientifiques appellent l’Europe Š combler le déficit de financement en faveur de la biodiversité"
https://www.lemonde.fr/planete/article/202

Plus de 1 500 scientifiques appellent l’Europe à combler le déficit de financement en faveur de la biodiversité
Alors que les négociations sur le budget de l’Union pour la période 2028-2034 doivent débuter, des chercheurs s’inquiètent de voir la protection de l’environnement reléguée au second rang des priorités.

Hundreds Mobilize in Montreal for “People’s Festival Against Fascism,” Block Far-Right Group https://itsgoingdown.org/hundreds-mobilize-in-montreal-for-peoples-festival-against-fascism-block-far-right-group/…

In bed, debating sleep or having someone soft-dom me into dreamland, you bet it’s the second one, see you all tomorrow.

My hands do this magic trick where I'm holding something in them and I turn around or jiggle a foot or think about Flipper for just a second and instantly whatever my hands had in them is gone.

An Operator Theoretic Derivation of a Bernoulli Stirling Identity: A Novel Use of the Euler Operator and Integration
Abdelhay Benmoussa
https://arxiv.org/abs/2505.22819

An Operator Theoretic Derivation of a Bernoulli Stirling Identity: A Novel Use of the Euler Operator and Integration
We present a novel proof of the classical identity relating Bernoulli numbers \( B_n \) and Stirling numbers of the second kind \( S(n,k) \), given by \[ B_n = \sum_{k=1}^n S(n,k)\frac{(-1)^k k!}{k+1}. \] Unlike traditional derivations based on generating functions or purely combinatorial arguments, our method leverages the Euler operator \( \vartheta = t \frac{d}{dt} \) and its algebraic action on analytic functions. By applying this operator repeatedly to a suitably chosen function and integr…

This https://arxiv.org/abs/2505.02270 has been replaced.
initial toot: https://mastoxiv.page/@ar…

Hyper Boris integrators for kinetic plasma simulations
We propose a family of numerical solvers for the nonrelativistic Newton--Lorentz equation in kinetic plasma simulations. The new solvers extend the standard 4-step Boris procedure, which has second-order accuracy in time, in three ways. First, we repeat the 4-step procedure multiple times, using an $n$-times smaller timestep ($Δt/n$). We derive a formula for the arbitrary subcycling number $n$, so that we obtain the result without repeating the same calculations. Second, prior to the 4-step pr…

The second moment of Ramanujan sums
Hong Ziwei, Zheng Zhiyong
https://arxiv.org/abs/2506.18395 https://arxiv.org/pdf/2506.18395

The second moment of Ramanujan sums
In this paper, we analyze $C(x, y)$, the second moment of Ramanujan sums. Assuming the Riemann Hypothesis, we derive an asymptotic formula for $C(x, y)$ with improved error term precision. The key feature of our approach is that it allows $x$ and $y$ to be arbitrarily close.

Multiple-Nanowire Superconducting Quantum Interference Devices: Critical Currents, Symmetries, and Vorticity Stability Regions
Cliff Sun, Alexey Bezryadin
https://arxiv.org/abs/2505.23095

Multiple-Nanowire Superconducting Quantum Interference Devices: Critical Currents, Symmetries, and Vorticity Stability Regions
An ordinary superconducting quantum interference device (SQUID) contains two weak links connected in parallel. We model a multiple-wire SQUID (MW-SQUID), generalized in two ways. First, the number of weak links, which are provided by parallel superconducting nanowires, is larger than two. Second, the current-phase relationship of each nanowire is assumed linear, which is typical for a homogeneous superconducting thin wire. For such MW-SQUIDs, our model predicts that the critical current ($I_c$)…

Liquid-liquid equilibria of systems containing 2-methoxyphenol or 2-ethoxyphenol and n-alkanes
Cristina Alonso Trist\'an, Jo\~ao Victor Alves-Laurentino, Fatemeh Pazoki, Susana Villa, Daniel Lozano-Mart\'in, Fernando Hevia
https://arxiv.org/abs/2506.22009

Liquid-liquid equilibria of systems containing 2-methoxyphenol or 2-ethoxyphenol and n-alkanes
Liquid-liquid equilibria phase diagrams have been determined for the systems: 2-methoxyphenol + n-decane, or + n-dodecane, or + n-tetradecane or + n-hexadecane and for 2-ethoxyphenol + n-octane, or + n-dodecane, or + n-tetradecane, or + n-hexadecane. The experimental method used is based on the observation, by means of a laser scattering technique, of the turbidity produced on cooling when a second phase appears. All the mixtures studied show an upper critical solution temperature, which increa…

sp_infectious: Art exhibit dynamic contacts (2011)
This dataset contains the daily dynamic contact networks collected during the Infectious SocioPatterns event that took place at the Science Gallery in Dublin, Ireland, during the artscience exhibition INFECTIOUS: STAY AWAY. Each file in the downloadable package contains a tab-separated list representing the active contacts during 20-second intervals of one day of data collection. Each line has the form “t i j“, where i and j are the a…

Israel-Iran air war enters second week as Europe pushes diplomacy (Reuters)
https://www.reuters.com/world/middle-east/israel-iran-air-war-enters-second-week-europe-pushes-diplomacy-2025-06-20/
http://www.memeorandum.com/250620/p54#a250620p54

Some Friday Night ÖPNV trivia: What local and regional trains in Europe have First Class? Only trains where Interrail is valid count. #BahnBubble
I’ll start with the Leonardo Express, Roma Termini–Fiumicino Aeroporto, which has *only* First Class. (Which comfort-wise is second class, though.)

This https://arxiv.org/abs/2505.22371 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_sta…

Adaptive tail index estimation: minimal assumptions and non-asymptotic guarantees
A notoriously difficult challenge in extreme value theory is the choice of the number $k\ll n$, where $n$ is the total sample size, of extreme data points to consider for inference of tail quantities. Existing theoretical guarantees for adaptive methods typically require second-order assumptions or von Mises assumptions that are difficult to verify and often come with tuning parameters that are challenging to calibrate. This paper revisits the problem of adaptive selection of $k$ for the Hill…

I'm baffled that this guy is a respected analyst. Yeah, an infinite number of AI agents will spend their money on content from human creators, making those humans infinitely rich. I see no flaws in this model.

This https://arxiv.org/abs/2505.15750 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Localising invariants in derived bornological geometry
We study several categories of analytic stacks relative to the category of bornological modules over a Banach ring. When the underlying Banach ring is a nonarchimedean valued field, this category contains derived rigid analytic spaces as a full subcategory. When the underlying field is the complex numbers, it contains the category of derived complex analytic spaces. In the second part of the paper, we consider localising invariants of rigid categories associated to bornological algebras. The ma…

Raiders mailbag: Will team sign veteran wide receiver before camp? https://www.reviewjournal.com/sports/raiders/raiders-mailbag-will-team-sign-veteran-wide-receiver-before-camp-3379463/

Whoever greenlit this _focus-stealing_ nag on the #Google home page, where it routinely interrupts whatever I'm typing into the search box: know that you're helping to drive me _away_ from Google, and that I hope you develop some sort of horrific incurable body odor to which your own nose never becomes acclimated.

On graph automorphisms related to Snort
Rylo Ashmore, Beth Ann Austin, Alfie M. Davies, Danny Dyer, William Kellough
https://arxiv.org/abs/2506.20669 https…

On graph automorphisms related to Snort
We study the outcomes of various positions of the game Snort. When played on graphs admitting an automorphism of order two that maps vertices outside of their closed neighbourhoods (called opposable graphs), the second player has a winning strategy. We give a necessary and sufficient condition for a graph to be opposable, and prove that the property of being opposable is preserved by several graph products. We show examples that a graph being second-player win does not imply that the graph is o…

Browns' Joe Flacco to showcase work ethic through QB battle: Being mentor is 'not the main focus' https://www.nfl.com/news/browns-joe-flacco-to-showcase-work-ethic-in-qb-battle-being-mentor-is-not-the-main-foc…

Irreversible dynamics on Poisson manifolds
Erwin Luesink
https://arxiv.org/abs/2506.22215 https://arxiv.org/pdf/2506.22215

Irreversible dynamics on Poisson manifolds
We present a geometric construction of irreversible dynamics on Poisson manifolds that satisfies the axioms of metriplectic mechanics and the GENERIC framework. Our approach relies solely on the underlying Poisson structure and its deformation theory, without requiring any additional metric structure. Specifically, we show that if the second Lichnerowicz-Poisson cohomology group of a Poisson manifold is nontrivial, one can construct a symmetric bracket that generates irreversible dynamics compa…

This https://arxiv.org/abs/2412.11313 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Stable Recovery of Regularized Linear Inverse Problems
Recovering a low-complexity signal from its noisy observations by regularization methods is a cornerstone of inverse problems and compressed sensing. Stable recovery ensures that the original signal can be approximated linearly by optimal solutions of the corresponding Morozov or Tikhonov regularized optimization problems. In this paper, we propose new characterizations for stable recovery in finite-dimensional spaces, uncovering the role of nonsmooth second-order information. These insights en…

Even Elysium’s director thinks his film is a mess – but a decade on, it deserves a second chance https://www.theguardian.com/film/2025/jun/10/even-elysiums-director-thinks-hi…

Battery recycler Redwood Materials and Project Stargate member Crusoe launch a 2,000-GPU data center in Nevada powered by repurposed EV batteries (Michelle Ma/Bloomberg)
https://www.bloomberg.com/news/articles/20

Crusoe, Redwood Partner on Nevada Data Center Powered by Used Batteries
It’s the world largest deployment of batteries on their second life and shows the lengths cloud operators are going to find power.

Learning-Based Robust Fixed-Time Terminal Sliding Mode Control
Chaimae El Mortajinea, Moussa Labbadib, Adnane Saoudc, Mostafa Bouzia
https://arxiv.org/abs/2505.22827

Learning-Based Robust Fixed-Time Terminal Sliding Mode Control
In this paper, we develop and analyze an integral fixed-time sliding mode control method for a scenario in which the system model is only partially known, utilizing Gaussian processes. We present two theorems on fixed-time convergence. The first theorem addresses the fully known system model, while the second considers situations where the system's drift is approximated utilizing Gaussian processes (GP) for approximating unknown dynamics. Both theorems establish the global fixed-time stability …

Geez, I realized I hadn’t posted several recent books. There were a couple Nigerian science fiction books:
“Rosewater” by Tade Thompson. A mysterious alien biodome heals people when it opens up once a year, but Kaaro, who has some special abilities, begins to uncover some secrets that point to a more sinister purpose.
Loved the first half, but thought it fell off in the second half.
3/5 stars ⭐️ ⭐️ ⭐️

Rosewater (The Wormwood Trilogy, #1)
Tade Thompson's Rosewater is the start of an award-winn…

The gravitational Compton amplitude from flat and curved spacetimes at second post-Minkowskian order
N. Emil J. Bjerrum-Bohr, Gang Chen, Carl Jordan Eriksen, Nabha Shah
https://arxiv.org/abs/2506.19705

The gravitational Compton amplitude from flat and curved spacetimes at second post-Minkowskian order
We utilize various computational techniques in flat and curved backgrounds to calculate the classical gravitational Compton amplitude up to the second post-Minkowskian order. Our novel result supports the use of worldline quantum field theory in non-trivial background spacetimes to obtain new theoretical insights that can both enhance computational efficiency and provide useful cross-checks of results, particularly in the context of classical binary black hole mergers.

Comment on "Long-range crossed Andreev reflection in a topological insulator nanowire proximitized by a superconductor" by Junya Feng et al
E. S. Tikhonov, V. S. Khrapai
https://arxiv.org/abs/2505.23490

Comment on "Long-range crossed Andreev reflection in a topological insulator nanowire proximitized by a superconductor" by Junya Feng et al
We argue that the interpretation of the experiment [Nature Physics 21, 708-715 (2025)] is misleading in two respects. First, the bias voltages impact the non-local differential conductance randomly, rather than systematically, and the bias symmetry of the non-local conductance in Fig. 3 can be explained by a fine tuned self-gating effect. Second, the full knowledge of the conductance matrix is insufficient to conclude on the relative values of the crossed-Andreev and elastic cotunneling probabi…

Cowboys Star Offensive Lineman’s Latest Offseason Activity Turns Heads https://heavy.com/sports/nfl/dallas-cowboys/tyler-guyton-offseason-activity-turns-heads/?adt_ei=[email]

This https://arxiv.org/abs/2412.11313 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Stable Recovery of Regularized Linear Inverse Problems
Recovering a low-complexity signal from its noisy observations by regularization methods is a cornerstone of inverse problems and compressed sensing. Stable recovery ensures that the original signal can be approximated linearly by optimal solutions of the corresponding Morozov or Tikhonov regularized optimization problems. In this paper, we propose new characterizations for stable recovery in finite-dimensional spaces, uncovering the role of nonsmooth second-order information. These insights en…

Not so long ago, members of high society were fixated on trying to low-key their way out of the perils of income inequality.
Minimalism and quiet luxury were in vogue.
But in the wake of President Trump’s second election, it’s the luxe life at full volume.
He gilded the White House, turning it into a Rococo Liberace lair.
Swaggy and braggy have replaced stealth wealth.
Flaunting it is in.
For women, that means sequins, diamonds, tight silhouettes and big h…

Opinion | Lauren Sánchez, Jeff Bezos and the Triumph of Tacky
In the wake of President Trump’s second election, it’s the luxe life at full volume.

Voltage Control of the Boost Converter: PI vs. Nonlinear Passivity-based Control
Leyan Fang, Romeo Ortega, Robert Gri\~n\'o
https://arxiv.org/abs/2505.23112

Voltage Control of the Boost Converter: PI vs. Nonlinear Passivity-based Control
We carry-out a detailed analysis of direct voltage control of a Boost converter feeding a simple resistive load. First, we prove that using a classical PI control to stabilize a desired equilibrium leads to a very complicated dynamic behavior consisting of two equilibrium points, one of them always unstable for all PI gains and circuit parameter values. Interestingly, the second equilibrium point may be rendered stable -- but for all tuning gains leading to an extremely large value of the circu…

Amazon launches its second batch of 27 Kuiper satellites to low Earth orbit via a ULA rocket, taking the total in orbit to 54 of its planned 3,236 constellation (Annie Palmer/CNBC)
https://www.cnbc.com/2025/06/23/amazon-kuiper-satellites-musk-starlink.h…

Amazon launches second batch of Kuiper internet satellites, taking on Elon Musk's Starlink
Amazon has sent more Kuiper craft into space as it looks to deploy a satellite constellation that rivals Starlink, a service operated by Elon Musk's SpaceX.

Second-year NFL players primed for breakout season in 2025: Michael Penix Jr., explosive Dolphins WR, and more

https://www.cbssports.com/nfl/ne…

D.C. delegate in Congress insists for second time she's running for re-election. Her office again says no decision yet. (NBC News)
https://www.nbcnews.com/politics/congress/dc-delegate-eleanor-holmes-norton-reelection-rcna215141
http://www.memeorandum.com/250626/p5#a250626p5

Linear and Second-order-cone Valid Inequalities for Problems with Storage
Juan M. Morales
https://arxiv.org/abs/2506.21470 https://ar…

Linear and Second-order-cone Valid Inequalities for Problems with Storage
Batteries are playing an increasingly central role as distributed energy resources in the shift toward power systems dominated by renewable energy sources. However, existing battery models must invariably rely on complementarity constraints to prevent simultaneous charging and discharging, rendering models of a disjunctive nature and NP-hard. In this paper, we analyze the disjunctive structure of the battery's feasible operational set and uncover a submodularity property in its extreme power tr…

Would Raiders Fans Give Henry Ruggs III A Second Chance? https://raiderramble.com/2025/06/18/would-raiders-fans-give-henry-ruggs-iii-a-second-chance/

Cowboys may be losing talent-acquiring method as NFL phases out draft option https://cowboyswire.usatoday.com/story/sports/nfl/cowboys/2025/06/28/supplemental-draft-dodging-nfl-cowboys-2025/84390235007/…

Agent's Take: What is holding up NFL Draft second-rounders from signing rookie deals?

https://www.cbssports.com/nfl/news/agents-take…

sp_primary_school: Primary school dynamic contacts (2009)
Two temporal networks of contacts among students and teachers at a primary school in Lyon, France, on consecutive days of in October 2009. Each network accumulates all contacts over the course of a single day; contacts were sampled at 20-second intervals.
This network has 242 nodes and 125773 edges.
Tags: Social, Offline, Weighted, Temporal, Metadata

Browns QB Shedeur Sanders cited for second speeding violation earlier this month, per police records

https://www.cbssports.com/nfl/news/browns-…

Unveiling our NFL QB tiers for 2025 with one surprise, plus why most second-round picks have not been signed

https://www.cbssports.com/nfl/new…