Tootfinder

Study of the Connected Four-Point Correlation Function of Galaxies from DESI Data Release 1 Luminous Red Galaxy Sample
J. Hou, R. N. Cahn, J. Aguilar, S. Ahlen, D. Bianchi, D. Brooks, T. Claybaugh, P. Doel, S. Ferraro, J. E. Forero-Romero, E. Gazta\~naga, L. Le Guillou, G. Gutierrez, K. Honscheid, D. Huterer, M. Ishak, R. Joyce, S. Juneau, R. Kehoe, D. Kirkby, T. Kisner, A. Kremin, C. Lamman, M. Landriau, A. de la Macorra, M. Manera, A. de Mattia, R. Miquel, E. Mueller, S. Nadathur, G.…

Study of the Connected Four-Point Correlation Function of Galaxies from DESI Data Release 1 Luminous Red Galaxy Sample
We present a measurement of the non-Gaussian four-point correlation function (4PCF) from the DESI DR1 Luminous Red Galaxy (LRG) sample. For the gravitationally induced parity-even 4PCF, we detect a signal with a significance of 14.7$σ$ using our fiducial setup. We assess the robustness of this detection through a series of validation tests, including auto- and cross-correlation analyses, sky partitioning across multiple patch combinations, and variations in radial scale cuts. Due to the low co…

Variational Construction of Homoclinic and Heteroclinic Orbits in the Planar Sitnikov Problem
Yuika Kajihara, Mitsuru Shibayama, Guowei Yu
https://arxiv.org/abs/2508.08051 https…

Variational Construction of Homoclinic and Heteroclinic Orbits in the Planar Sitnikov Problem
The Sitnikov problem is a special case of the three-body problem. The system is known to be chaotic and has been studied by symbolic dynamics (J. Moser, Stable and random motions in dynamical systems, Princeton University Press, 1973). We study the limiting case of the Sitnikov problem as the eccentricity of the massive particles tends to 1. By variational method, we show the existence of infinitely many homoclinic and heteroclinic solutions in the planar Sitnikov problem. In a previous work, f…

🇺🇦 #NowPlaying on KEXP's #VarietyMix
MJ Lenderman:
🎵 Just Be Simple
#MJLenderman
https://runforcoverrecords.bandcamp.com/track/mj-lenderman-just-be-simple
https://open.spotify.com/track/6qyGUBuAZWg0gFbjmq2K0U

PureSample: Neural Materials Learned by Sampling Microgeometry
Zixuan Li, Zixiong Wang, Jian Yang, Milos Hasan, Beibei Wang
https://arxiv.org/abs/2508.07240 https://

PureSample: Neural Materials Learned by Sampling Microgeometry
Traditional physically-based material models rely on analytically derived bidirectional reflectance distribution functions (BRDFs), typically by considering statistics of micro-primitives such as facets, flakes, or spheres, sometimes combined with multi-bounce interactions such as layering and multiple scattering. These derivations are often complex and model-specific, and typically consider a statistical aggregate of a large surface area, ignoring spatial variation. Once an analytic BRDF's eva…

Sampling Strategies for Robust Universal Quadrupedal Locomotion Policies
David Rytz, Kim Tien Ly, Ioannis Havoutis
https://arxiv.org/abs/2510.07094 https://

Sampling Strategies for Robust Universal Quadrupedal Locomotion Policies
This work focuses on sampling strategies of configuration variations for generating robust universal locomotion policies for quadrupedal robots. We investigate the effects of sampling physical robot parameters and joint proportional-derivative gains to enable training a single reinforcement learning policy that generalizes to multiple parameter configurations. Three fundamental joint gain sampling strategies are compared: parameter sampling with (1) linear and polynomial function mappings of ma…

Period maps at infinity
Mark Green, Phillip Griffiths, Colleen Robles
https://arxiv.org/abs/2509.08508 https://arxiv.org/pdf/2509.08508

Period maps at infinity
Let $\overline{B}$ be a smooth projective varieity, and $Z \subset \overline{B}$ a simple normal crossing divisor. Assume that $B = \overline{B} - Z$ admits a variation of pure, polarized Hodge structure. The divisor $Z$ is naturally stratified, and Schmid's nilpotent orbit theorem defines a family/variation of nilpotent orbits along each strata. We study the rich geometric structure encoded by this family, its relationship to the induced (quotient) variation of pure Hodge structure on the stra…

On Variations in GB Grid Electricity CO2 Intensity: Samples - CO2 per grid kWh by h/d/m/y. - https://www.earth.org.uk/note-on-UK-grid-CO2-intensity-variations.html

On Variations in GB Grid Electricity CO2 Intensity: Samples
CO2 per grid kWh by h/d/m/y.

Mix- and MoE-DPO: A Variational Inference Approach to Direct Preference Optimization
Jason Bohne, Pawel Polak, David Rosenberg, Brian Bloniarz, Gary Kazantsev
https://arxiv.org/abs/2510.08256

Mix- and MoE-DPO: A Variational Inference Approach to Direct Preference Optimization
Direct Preference Optimization (DPO) has recently emerged as a simple and effective alternative to reinforcement learning from human feedback (RLHF) for aligning large language models (LLMs) with user preferences. However, existing DPO formulations rely on a single monolithic model, which limits their expressivity in multi-task settings and their adaptability to heterogeneous or diverse preference distributions. In this work, we propose Mix- and MoE-DPO, a framework that extends DPO with both s…

Foreldrene mine, som bor i #Kvæfjord, er (i likhet med hele kommunen) ekstremt stolte over verdens stŸrste #kvæfjordkake - og Norges stŸrste kake - som ble servert på Borkenes i dag.

Statsministeren fikk smake på rekordbakst: – Jeg elsker Kvæfjordkake
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Estimating the heterogeneity of pressure profiles within a complete sample of 55 galaxy clusters: a Bayesian Hierarchical Model
Fabio Castagna, Stefano Andreon, Marco Landoni, Alberto Trombetta
https://arxiv.org/abs/2509.07095

Estimating the heterogeneity of pressure profiles within a complete sample of 55 galaxy clusters: a Bayesian Hierarchical Model
Galaxy clusters exhibit heterogeneity in their pressure profiles, even after rescaling, highlighting the need for adequately sized samples to accurately capture variations across the cluster population. We present a Bayesian hierarchical model that simultaneously fits individual cluster parameters and the underlying population distribution, providing estimates of the population-averaged pressure profile and the intrinsic scatter, as well as accurate pressure estimates for individual objects. We…