Tootfinder

Even Faster Kernel Matrix Linear Algebra via Density Estimation
Rikhav Shah, Sandeep Silwal, Haike Xu
https://arxiv.org/abs/2510.02540 https://arxiv.org/pd…

Even Faster Kernel Matrix Linear Algebra via Density Estimation
This paper studies the use of kernel density estimation (KDE) for linear algebraic tasks involving the kernel matrix of a collection of $n$ data points in $\mathbb R^d$. In particular, we improve upon existing algorithms for computing the following up to $(1+\varepsilon)$ relative error: matrix-vector products, matrix-matrix products, the spectral norm, and sum of all entries. The runtimes of our algorithms depend on the dimension $d$, the number of points $n$, and the target error $\varepsilon…

Towards Data-Driven Metrics for Social Robot Navigation Benchmarking
Pilar Bachiller-Burgos, Ulysses Bernardet, Luis V. Calderita, Pranup Chhetri, Anthony Francis, Noriaki Hirose, No\'e P\'erez, Dhruv Shah, Phani T. Singamaneni, Xuesu Xiao, Luis J. Manso
https://arxiv.org/abs/2509.01251

Towards Data-Driven Metrics for Social Robot Navigation Benchmarking
This paper presents a joint effort towards the development of a data-driven Social Robot Navigation metric to facilitate benchmarking and policy optimization. We provide our motivations for our approach and describe our proposal for storing rated social navigation trajectory datasets. Following these guidelines, we compiled a dataset with 4427 trajectories -- 182 real and 4245 simulated -- and presented it to human raters, yielding a total of 4402 rated trajectories after data quality assurance…

1,000 Swiss glaciers already gone, and the melting is speeding up #Switzerland

1,000 Swiss glaciers already gone, and the melting is speeding up
Swiss glaciers lost nearly 3% of their volume in 2025, following a snow-poor winter and scorching summer heatwaves. The melt has been so extreme that some glaciers lost more than two meters of ice thickness in a single season. Scientists caution that the decline is destabilizing mountains, raising risks of rock and ice avalanches. Long-term monitoring efforts are now more critical than ever.

Tilted Dirac cones and their topology in Holographic Materials
Jeong-Won Seo, Taewon Yuk, Sang-Jin Sin
https://arxiv.org/abs/2509.03033 https://arxiv.org/p…

Tilted Dirac cones and their topology in Holographic Materials
We explore strongly correlated materials with tilted Dirac cone by introducing a method to realize this spectral feature within a holographic setup. Following the work by Moradpouri et al., we construct an asymptotically AdS spacetime by uplifting the vielbein of Volovik et al to tilt the flat spacetime light cone. We then couple the resulting metric to holographic fermions and compute their spectral functions, confirming the presence of a tilted Dirac cone in momentum space. We also calculate …

Bessmertny\u{i} realizations of symmetric multivariate rational matrix functions over any field
Jason Elsinger, Ian Orzel, Aaron Welters
https://arxiv.org/abs/2509.00553 https:/…

Bessmertnyĭ realizations of symmetric multivariate rational matrix functions over any field
In this paper, we prove the following. First, every square matrix whose entries are multivariable rational functions over a field $\mathbb{F}$ has a Bessmertnyĭ realization, i.e., is the Schur complement of an affine linear square matrix pencil with coefficients in $\mathbb{F}$. Second, if the matrix is also symmetric and the characteristic of the field $\mathbb{F}$ is not two then it has a symmetric Bessmertnyĭ realization (i.e., the pencil can be chosen to consist of symmetric matrices) and…

Review of Honor Magic V5, the world's thinnest foldable phone at 8.8mm thick when folded, as it launches in Europe for €1,999, following a July launch in China (Dominic Preston/The Verge)
https://www.theverge.com/phone-review/766712/honor-magic…

Honor’s Magic V5 is the thinnest foldable yet, but that’s not why it matters
Thin is in, but the big battery is the Honor Magic V5’s real magic trick.

Spirits in the Stacks: A Ghostly Tour at the Congregational Library & Archives
https://ift.tt/mb4RdeS
ANN: New Book on Matriculture, Shamanism, and the Authority of Women: The Powers That Be Linnéa…
via Input 4 RELCFP

Russian oil refinery in Samara Oblast in flames after drone attack, media reports: https://benborges.xyz/2025/08/28/russian-oil-refinery-in-samara.html

Weak-strong uniqueness for general cross-diffusion systems with volume filling
Maria Heitzinger, Ansgar J\"ungel
https://arxiv.org/abs/2509.25978 https://

Weak-strong uniqueness for general cross-diffusion systems with volume filling
The weak-strong uniqueness of solutions to a broad class of cross-diffusion systems with volume filling is established. In general, the diffusion matrices are neither symmetric nor positive definite. This issue is overcome by supposing that the equations possess a Boltzmann-type entropy structure, which ensures the existence of bounded weak solutions. In this framework, general conditions on the mobility matrix are identified that allow for the proof of the weak-strong uniqueness property by me…

H-Net Job Guide Weekly Report for H-Buddhism: 24 August - 31 August
https://ift.tt/xmMEGcC
ANN: New Book on Matriculture, Shamanism, and the Authority of Women: The Powers That Be Linnéa…
via Input 4 RELCFP