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F-isocrystals of Higher Direct Images of $p$-Divisible Groups
Zhenghui Li, Yanshuai Qin
https://arxiv.org/abs/2506.11736 https://arxi…

F-isocrystals of Higher Direct Images of $p$-Divisible Groups
For a $p$-divisible group $G$ over a smooth projective variety $X$ over $k$, where $k$ is a field finitely generated over a perfect field of characteristic $p$, we show that the formal group $R^i f_{\fppf*} G$ is isogenous to a $p$-divisible group. The Dieudonné crystal of its divisible part is canonically isomorphic to the slope-$[0,1]$ part of $R^i f_{\crys*} \cM^{cr}(G)$ in the category of $F$-isocrystals over $k$. This provides an answer to the rational form of a question of Artin--Mazur r…

Power Diagram Enhanced Adaptive Isosurface Extraction from Signed Distance Fields
Pengfei Wang, Ziyang Zhang, Wensong Wang, Shuangmin Chen, Lin Lu, Shiqing Xin, Changhe Tu
https://arxiv.org/abs/2506.09579

Power Diagram Enhanced Adaptive Isosurface Extraction from Signed Distance Fields
Extracting high-fidelity mesh surfaces from Signed Distance Fields has become a fundamental operation in geometry processing. Despite significant progress over the past decades, key challenges remain namely, how to automatically capture the intricate geometric and topological structures encoded in the zero level set of SDFs. In this paper, we present a novel isosurface extraction algorithm that introduces two key innovations: 1. An incrementally constructed power diagram through the addition of…

Numerical modeling of isochoric heating experiments using the TROLL code in the warm dense matter regime
S\'ebastien Rassou, Marie Bonneau, Christophe Rousseaux, Xavier Vaisseau, Witold Cayzac, Adrien Denoeud, Fr\'ed\'eric Perez, Tom Beaumont, Morris Demoulins, Jean-Christophe Pain
https://arxiv.org/abs/2506.08912

Numerical modeling of isochoric heating experiments using the TROLL code in the warm dense matter regime
Experiments of isochoric heating by protons of solid material were recently performed at LULI laser facilities. In these experiments, protons, produced from target normal sheath acceleration (TNSA) of Au foil with the PICO2000 laser, deposit their energy into an aluminum or copper foil initially at room temperature and solid density. The heated material reaches the warm dense matter regime with temperature in the rear face of the material between 1 and 5 eV. The temperature is inferred by strea…

Revisiting Isocurvature Bounds on the Minimal QCD Axion
Peter W. Graham, Davide Racco
https://arxiv.org/abs/2506.03348 https://arxiv.…

Revisiting Isocurvature Bounds on the Minimal QCD Axion
The QCD axion has important connections to early universe cosmology. For example, it is often said that isocurvature limits rule out a combination of high axion decay constant, $f_a$, and high inflationary Hubble scale, $H_I$. High scales are theoretically motivated, so it is important to ask how robust this constraint is. We demonstrate that this constraint is naturally evaded when the quartic coupling of the complex $U(1)_\mathrm{PQ}$-breaking field is small. In this case, $f_a$ changes from …

This https://arxiv.org/abs/2505.11205 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csSE_…

IssueCourier: Multi-Relational Heterogeneous Temporal Graph Neural Network for Open-Source Issue Assignment
Issue assignment plays a critical role in open-source software (OSS) maintenance, which involves recommending the most suitable developers to address the reported issues. Given the high volume of issue reports in large-scale projects, manually assigning issues is tedious and costly. Previous studies have proposed automated issue assignment approaches that primarily focus on modeling issue report textual information, developers' expertise, or interactions between issues and developers based on h…

This https://arxiv.org/abs/2503.14904 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hept…

Axion Stabilization in Modular Cosmology
The $SL(2,\mathbb{Z})$ invariant $α$-attractor models have plateau potentials with respect to the inflaton and axion fields. The potential in the axion direction is almost exactly flat during inflation, hence, the axion field remains nearly massless. In this paper, we develop a generalized class of such models, where the $SL(2,\mathbb{Z})$ symmetry is preserved, but the axion acquires a large mass and becomes strongly stabilized during inflation, which eliminates isocurvature perturbations in …

🇺🇦 #NowPlaying on KEXP's #MiddayShow
Cumulus:
🎵 Lose Your Mind
#Cumulus
https://cumulus.bandcamp.com/track/lose-your-mind
https://open.spotify.com/track/3URvtWUI3g5UESJUR8gccd

The DECam Field of Streams: a deep view of the Milky Way halo
Peter Ferguson, Nora Shipp
https://arxiv.org/abs/2506.05469 https://arx…

The DECam Field of Streams: a deep view of the Milky Way halo
We present a Field of Streams visualizing stellar structures in the Milky Way halo as viewed by the Dark Energy Camera (DECam). We use $g$- and $r$-band imaging from the Dark Energy Survey and the DECam Legacy Survey, covering $18{,}700 °^2$ across the sky. Using an isochrone-based matched filter in $g$ vs. $g-r$, we select old and metal-poor stars in three distance bins, and generate a false-color RGB image of the number density of selected stars. The DECam Field of Streams shows a variety of…

This https://arxiv.org/abs/2012.08151 has been replaced.
link: https://scholar.google.com/scholar?q=a

Gravitational wave constraints on the primordial black hole dominated early universe
We calculate the gravitational waves (GWs) induced by the density fluctuations due to inhomogeneous distribution of primordial black holes (PBHs) in the case where PBHs eventually dominate and reheat the universe by Hawking evaporation. The initial PBH density fluctuations are isocurvature in nature. We find that most of the induced GWs are generated right after evaporation, when the universe transits from the PBH dominated era to the radiation dominated era and the curvature perturbation start…

🇺🇦 #NowPlaying on KEXP's #DriveTime
Errol Eats Everything feat. Isaac Sawyer:
🎵 Don’t Matter None
#ErrolEatsEverything #IsaacSawyer
https://pfcuttin.bandcamp.com/track/errol-eats-everything-ft-isaac-sawyer-dont-matter-none
https://open.spotify.com/track/51QzL8u2ECBlVfoTIgmGIn