Tootfinder

Graffiti written on sand. I think there’s a metaphor here struggling to get out…
#photography #graffiti

AWS unveils its 192-core Graviton5 processor, with an up to 25% performance boost over Graviton4, and says Graviton makes up 50% of AWS' new CPU capacity (About Amazon)
https://www.aboutamazon.com/news/aws/aws-graviton-5-cpu-amazon-ec2

AWS introduces Graviton5—the company’s most powerful and efficient CPU
Fifth generation chip provides the best price performance for a broad range of workloads in Amazon EC2.

Federal lawmakers sent a letter to the Department of Homeland Security (DHS)
demanding information on any plans Immigration and Customs Enforcement (ICE) has
to use Graphite, a spyware program that can access
— without the owner’s knowledge or consent
— a phone’s location data, photos, and encrypted applications, including WhatsApp and Signal.
Last year, the Biden administration paused the contract with Paragon Solutions, which operates Graphite,
while it …

Lawmakers Demand Information About Potential Use of Paragon Spyware by ICE
The lawmakers warned that allowing ICE to use spyware “threatens Americans’ freedom of movement and freedom of speech.”…

X greift nicht ein: Sexuelle Fake-Bilder echter Frauen kursieren weiter
Die Grok-KI erstellt öffentlich sexuelle Deepfakes von Frauen und Kindern. Bis das behoben ist, läuft die Funktion offenbar einfach weiter.

The electromagnetic field in Poisson gauge theory: the groupoidal approach
Fabio Di Cosmo, Vladislav G. Kupriyanov, Patrizia Vitale
https://arxiv.org/abs/2510.04858 https://

The electromagnetic field in Poisson gauge theory: the groupoidal approach
We consider the problem of defining the field strength of abelian potentials when the spacetime is a Poisson manifold, within the groupoidal approach. The natural definition in terms of gauge invariant momenta is proved to be equivalent to covariant and invariant tensors of a local symplectic groupoid representing a symplectic realization of the Poisson manifold. A Poisson Chern-Simons model is then proposed and its equations of motion are shortly discussed.

High order well-balanced and total-energy-conserving local discontinuous Galerkin methods for compressible self-gravitating Euler equations
Liang Pan, Wei Chen, Jianxian Qiu, Tao Xiong
https://arxiv.org/abs/2510.04112

High order well-balanced and total-energy-conserving local discontinuous Galerkin methods for compressible self-gravitating Euler equations
In this paper, we develop a high order structure-preserving local discontinuous Galerkin (DG) scheme for the compressible self-gravitating Euler equations, which pose great challenges due to the presence of time-dependent gravitational potential. The designed scheme is well-balanced for general polytropic equilibrium state and total energy conserving for multiple spatial dimensions without an assumption of spherical symmetry. The well-balanced property is achieved by decomposing the gravitation…

Gravitomagnetic-Hydrodynamics and Turbulence in Early Universe
Jiaxiang Liang, Peng Xu, Minghui Du, Yifu Cheng, Zhan Wang, Ziren Luo
https://arxiv.org/abs/2510.03711 https://

Gravitomagnetic-Hydrodynamics and Turbulence in Early Universe
This work tries to establish the theoretical framework for gravitomagnetic-hydrodynamics (GMHD), revealing a fundamental correspondence between geometrodynamics and magnetohydrodynamic phenomena in general relativity. By introducing the gravitoelectromagnetic formalism to relativistic fluids, a set of leading-order GMHD equations is derived that govern the co-evolution of spacetime geometry and matter dynamics in the early Universe. This analysis reveals that, under high-temperature and high-de…

An Enriched Approach to the Strictification of $(\infty,1)$-Categories
Kimball Strong
https://arxiv.org/abs/2510.04254 https://arxiv.org/pdf/2510.04254

An Enriched Approach to the Strictification of $(\infty,1)$-Categories
We define a functor which takes in an $(\infty,1)$-category and outputs an $(ω,1)$-category, the natural maximally "strict" version of an $(\infty,1)$-category. We do this by modeling $(\infty,1)$-categories as categories enriched in $\infty$-groupoids, and then "locally strictifying" (applying the strictification of $\infty$-groupoids to each hom space) to obtain a category enriched in $ω$-groupoids with respect to the Gray tensor product, followed by "globally strictifying" (strictifying th…

Limiting the Yukawa Gravity through the Black Hole Shadows of Sgr A* and M87*
Yuan Tan, Youjun Lu, Kunyu Song
https://arxiv.org/abs/2510.04210 https://arxi…

Limiting the Yukawa Gravity through the Black Hole Shadows of Sgr A* and M87*
Recently, the \textit{EHT} collaboration unveiled the shadow images of the supermassive black hole (SMBH) M87* and Sgr A*, with angular radii of $42\pm3$\,$μ$as and $48.7\pm7.0$\,$μ$as, respectively. These observations are consistent with the shadow of a Kerr black hole in general relativity (GR). Observations of the shadow of SMBHs can be used to test modified gravity theories, including Yukawa gravity, in extremely strong fields. In this paper, we illustrate the shadows of Yukawa black hole…

Scattering of massive neutrino test fields from a gravitational pulse
Tekin Dereli, Yorgo Senikoglu
https://arxiv.org/abs/2510.04687 https://arxiv.org/pdf/…

Scattering of massive neutrino test fields from a gravitational pulse
Linearized Einstein-Weyl equations are solved precisely in the context of sandwich gravitational waves. The neutrino's energy-momentum depends on the geometry and composition of the gravitational pulse when it is scattered. Since the background remains unchanged at the test field level, the neutrino's energy density will exhibit fluctuations between positive and negative extremes when traversing the sandwich wave. These variations could provide insights into the behavior of models concerning ne…