Tootfinder

Little Red reionization factories
Fan Zhang
https://arxiv.org/abs/2508.13541 https://arxiv.org/pdf/2508.13541

Little Red reionization factories
In this note, we suggest the possibility that an elucidation of the nature of the numerous Little Red Dots (LRDs) at high redshifts, may facilitate the resolution of another concurrent cosmic puzzle, namely reionization. Specifically, it is hypothesized that intergalactic HI gas is compelled by the tidal field associated with a growing gravitational entropy, in the form of gas streams, into colliding at the LRD sites. The resulting shock heating and compression encourage starburst activities, w…

Generalized Algebra Grounded on Nonadditive Entropies
Leandro Lyra Braga Dognini, Constantino Tsallis
https://arxiv.org/abs/2508.13324 https://arxiv.org/pd…

Generalized Algebra Grounded on Nonadditive Entropies
A $N$-body system is simple if all associated physically relevant space-time correlations are short-ranged, meaning that their momenta of all orders are finite. Such systems typically have a total number $W$ of admissible microscopic configurations which grows with $N$ as $W(N) \sim μ^N\;(μ>1, \, N\to\infty)$. Their thermostatistical properties are known to be satisfactorily handled within Boltzmann-Gibbs (BG) statistical mechanics. In contrast, a system is complex if one or more associated c…

Higher Zariski Geometry
Ko Aoki, Tobias Barthel, Anish Chedalavada, Tomer Schlank, Greg Stevenson
https://arxiv.org/abs/2508.11621 https://arxiv.org/pdf/25…

Higher Zariski Geometry
We revisit the classical constructions of tensor-triangular geometry in the setting of stably symmetric monoidal idempotent-complete $\infty$-categories, henceforth referred to as 2-rings. In this setting, we produce a Zariski topology, a Zariski spectrum, a category of locally 2-ringed spaces (more generally $\infty$-topoi), and an affine spectrum-global sections adjunction, based on the framework of ``$\infty$-topoi with geometric structure'' as developed by Lurie in \cite{LurieDAG5}. Using w…

Analytic Model for Scattered Ly$\boldsymbol{\alpha}$ Emission in the Post-reionization Intergalactic Medium
Hyunbae Park, Hyunmi Song, Chris Byrohl, Aaron Smith, Yajima Hidenobu, Zarija Luki\'c
https://arxiv.org/abs/2509.11268

Analytic Model for Scattered Ly$\boldsymbolα$ Emission in the Post-reionization Intergalactic Medium
Ly$α$ intensity mapping is emerging as a new probe of faint galaxies consisting the cosmic web that elude traditional surveys. However, the resonant nature of Ly$α$ radiative transfer complicates the interpretation of observed data. In this study, we develop a fast and accurate analytic prescription for computing the Ly$α$ intensity field on Mpc scales in the post-reionization Universe. Motivated by insights from Monte Carlo radiative transfer (MCRT) experiments, we exploit the fact that in …

Hybrid waveforms for precessing quasi-circular binary systems
Joan Llobera-Querol, Sascha Husa, Maria de Lluc Planas
https://arxiv.org/abs/2509.14107 https://

Hybrid waveforms for precessing quasi-circular binary systems
The demand for long and accurate gravitational waveforms is increasing as we prepare for the next generation of detectors and seek to improve current waveform models. However, numerical relativity waveforms, while highly accurate, are often too short for these applications due to their high computational cost. Hybrid waveforms, which stitch together gravitational wave signals from different modeling approaches, provide a way to generate complete inspiral-merger-ringdown signals. While hybridiza…

As usual we watched the "Stoertebekker" stage play at Ralswiek on Rügen Island. The stage setups and wardrobes were as awesome as always. They really try to improve on that every year and come up with clever mechanisms to transform the building for the various acts of the play. The script this year left room for desire ;) Nevertheless a happing worth attending
htt…

And <sigh/> no, the #debian13trixie upgrade saga isn't (yet) complete. The Gnome file manager -- still known to #debian as 'nautillus', for historical reasons -- was missing on my laptop.
apt install --reinstall nautillus
fixed that, and also brought in a bunch of oth…

DualTrack: Sensorless 3D Ultrasound needs Local and Global Context
Paul F. R. Wilson, Matteo Ronchetti, R\"udiger G\"obl, Viktoria Markova, Sebastian Rosenzweig, Raphael Prevost, Parvin Mousavi, Oliver Zettinig
https://arxiv.org/abs/2509.09530

DualTrack: Sensorless 3D Ultrasound needs Local and Global Context
Three-dimensional ultrasound (US) offers many clinical advantages over conventional 2D imaging, yet its widespread adoption is limited by the cost and complexity of traditional 3D systems. Sensorless 3D US, which uses deep learning to estimate a 3D probe trajectory from a sequence of 2D US images, is a promising alternative. Local features, such as speckle patterns, can help predict frame-to-frame motion, while global features, such as coarse shapes and anatomical structures, can situate the sc…

The American Civil Liberties Union of South Carolina filed a lawsuit Friday against Clemson University,
accusing the school of violating the First Amendment by firing a faculty member over a Facebook post criticizing the late conservative commentator Charlie Kirk.
The complaint, filed in U.S. District Court on behalf of former assistant professor
Joshua Bregy,
seeks his reinstatement, corrections to his personnel record and monetary damages.
“The First Amendme…

ACLU sues Clemson for firing professor over Facebook post criticizing Charlie Kirk
The American Civil Liberties Union of South Carolina filed a lawsuit Friday against Clemson University, accusing the school of violating the First Amendment by

And <sigh/> no, the #debian13trixie upgrade saga isn't (yet) complete. The Gnome file manager -- still known to #debian as 'nautillus', for historical reasons -- was missing on my laptop.
apt install --reinstall nautillus
fixed that, and also brought in a bunch of oth…