Tootfinder

Towards Understanding Visual Grounding in Visual Language Models
Georgios Pantazopoulos, Eda B. \"Ozyi\u{g}it
https://arxiv.org/abs/2509.10345 https://

Towards Understanding Visual Grounding in Visual Language Models
Visual grounding refers to the ability of a model to identify a region within some visual input that matches a textual description. Consequently, a model equipped with visual grounding capabilities can target a wide range of applications in various domains, including referring expression comprehension, answering questions pertinent to fine-grained details in images or videos, caption visual context by explicitly referring to entities, as well as low and high-level control in simulated and real …

Toposes with enough points as categories of \'etale spaces
Sam van Gool, J\'er\'emie Marqu\`es, Umberto Tarantino
https://arxiv.org/abs/2508.09604 https://

Toposes with enough points as categories of étale spaces
We extend Makkai duality between coherent toposes and ultracategories to a duality between toposes with enough points and ultraconvergence spaces. Our proof generalizes and simplifies Makkai's original proof. Our main result can also be seen as an extension to ionads of Barr's equivalence between topological spaces and relational modules for the ultrafilter monad. In view of the correspondence between toposes and geometric theories, we obtain a strong conceptual completeness theorem, in the sen…

Complications from surgery landed my dad back in the hospital late Wednesday. Successful exploratory surgery found and hopefully stopped the internal bleeding.
If a few key numbers remain stabile, he might get released today. But in the interim, it’ll have to be a Father’s Day video call to his hospital room.
There are myriad ways in which to view this, but I’m choosing gratefulness. #HappyFathersDay

When I die, I wanna come back as a panda: https://explore.org/livecams/panda-bears/china-panda-cam-1

Giant Panda Cam - live stream from China | Explore.org
Giant Panda Cam at the Gengda Panda Center in China shows live video of pandas eating and socializing.

TFRank: Think-Free Reasoning Enables Practical Pointwise LLM Ranking
Yongqi Fan, Xiaoyang Chen, Dezhi Ye, Jie Liu, Haijin Liang, Jin Ma, Ben He, Yingfei Sun, Tong Ruan
https://arxiv.org/abs/2508.09539 …

TFRank: Think-Free Reasoning Enables Practical Pointwise LLM Ranking
Reasoning-intensive ranking models built on Large Language Models (LLMs) have made notable progress, but existing approaches often rely on large-scale LLMs and explicit Chain-of-Thought (CoT) reasoning, resulting in high computational cost and latency that limit real-world use. To address this, we propose \textbf{TFRank}, an efficient pointwise reasoning ranker based on small-scale LLMs. To improve ranking performance, TFRank effectively integrates CoT data, fine-grained score supervision, and …

The thermal backreaction of a scalar field in de Sitter spacetime
Nikos Irges, Antonis Kalogirou, Fotis Koutroulis
https://arxiv.org/abs/2507.08774 https:/…

The thermal backreaction of a scalar field in de Sitter spacetime
We argue that a scalar field in de Sitter spacetime should feel explicit thermal effects associated with its curvature. Starting from the Bunch-Davies vacuum and a scalar field with small mass compared to the de Sitter curvature, we use the thermo-field dynamics formalism in order to expose these thermal effects. We compute the thermal Wightman function connecting two spacetime points and from it, via the point-splitting regularization technique, the renormalized thermal energy-momentum tensor.…

Sampling theorems for inverse problems on Riemannian manifolds
Giovanni S. Alberti, Ernesto De Vito, Bianca Gariboldi, Giacomo Gigante
https://arxiv.org/abs/2508.10810 https://

Sampling theorems for inverse problems on Riemannian manifolds
We consider inverse problems consisting of the reconstruction of an unknown signal $f$ from noisy measurements $y=Ff+\text{noise}$, where $Ff$ is a function on a Riemannian manifold without boundary $\mathcal M$. We consider the case when only pointwise samples are available, namely $y_j = (Ff)(x_j)+η_j$, where $\{x_j\}_{j=1}^n\subseteq\mathcal M$ is a Marcinkiewicz-Zygmund family. We derive sampling theorems providing explicit bounds on the reconstruction error depending on $n$, the smoothnes…

Pointwise explicit estimates for derivatives of solutions to linear parabolic PDEs with Neumann boundary conditions
C Ciccarella
https://arxiv.org/abs/2507.08622

Pointwise explicit estimates for derivatives of solutions to linear parabolic PDEs with Neumann boundary conditions
We establish a pointwise bound on the spatial derivative $\left| \frac{\partial V}{\partial x} \right|$ of the solution to a parabolic PDE with Neumann boundary conditions. The bound is fully explicit in the sense that it depends only on the coefficients of the PDE and the domain, including closed-form expression for all constants. The proof is purely probabilistic. We first extend to time inhomogeneous diffusions a result concerning the derivative of the solution of a reflected SDE…

Axis-level Symmetry Detection with Group-Equivariant Representation
Wongyun Yu, Ahyun Seo, Minsu Cho
https://arxiv.org/abs/2508.10740 https://arxiv.org/pdf…

Axis-level Symmetry Detection with Group-Equivariant Representation
Symmetry is a fundamental concept that has been extensively studied, yet detecting it in complex scenes remains a significant challenge in computer vision. Recent heatmap-based approaches can localize potential regions of symmetry axes but often lack precision in identifying individual axes. In this work, we propose a novel framework for axis-level detection of the two most common symmetry types-reflection and rotation-by representing them as explicit geometric primitives, i.e. lines and points…