Tootfinder

Ratjetoe aan rare voer­tuigen op het fietspad maakt Amsterdam ‘moedeloos’: ‘Onze stad is geen pretpark’ | de #Volkskrant
https://www.

Bridging Offline and Online Reinforcement Learning for LLMs
Jack Lanchantin, Angelica Chen, Janice Lan, Xian Li, Swarnadeep Saha, Tianlu Wang, Jing Xu, Ping Yu, Weizhe Yuan, Jason E Weston, Sainbayar Sukhbaatar, Ilia Kulikov
https://arxiv.org/abs/2506.21495 https://arxiv.org/pdf/2506.21495 https://arxiv.org/html/2506.21495
arXiv:2506.21495v1 Announce Type: new
Abstract: We investigate the effectiveness of reinforcement learning methods for finetuning large language models when transitioning from offline to semi-online to fully online regimes for both verifiable and non-verifiable tasks. Our experiments cover training on verifiable math as well as non-verifiable instruction following with a set of benchmark evaluations for both. Across these settings, we extensively compare online and semi-online Direct Preference Optimization and Group Reward Policy Optimization objectives, and surprisingly find similar performance and convergence between these variants, which all strongly outperform offline methods. We provide a detailed analysis of the training dynamics and hyperparameter selection strategies to achieve optimal results. Finally, we show that multi-tasking with verifiable and non-verifiable rewards jointly yields improved performance across both task types.
toXiv_bot_toot

Studie: Windparks könnten chemische Stoffe ins Meer abgeben
Forscher haben 228 Substanzen festgestellt, die die Anlagen potenziell abgeben könnten. Einige Emissionen seien vermeidbar.
https://www.

Chemical evolution imprints in the rare isotopes of nearby M dwarfs
Dar\'io Gonz\'alez Picos, Ignas Snellen, Sam de Regt
https://arxiv.org/abs/2508.18424 https://…

Chemical evolution imprints in the rare isotopes of nearby M dwarfs
Elements heavier than hydrogen and helium, collectively termed metals, were created inside stars and dispersed through space at the final stages of stellar evolution. The relative amounts of different isotopes (variants of the same element with different masses) in stellar atmospheres provide clues about how our galaxy evolved chemically over billions of years. M dwarfs are small, cool, long-lived stars that comprise three-quarters of all stars in our galaxy. Their spectra exhibit rich fingerpr…

Call for Papers: „Kunstbäume in Text und Bild der Vormoderne 2.0. – Kommunikation in ökologischen Verflechtungen“ an der Goethe-Universität Frankfurt am Main, vom 30. Oktober bis 1. November 2025
https://ift.tt/YcTsv7C
TOC: Dutch Crossing: Journal of Low Countries Studies, vol. 46, no. 3 (March 2022) Dutch……

Doubly Separable Spacetimes and Symmetry Constraints on their Self-Gravitating Matter Content
Prashant Kocherlakota, Ramesh Narayan
https://arxiv.org/abs/2507.18706 https://

Doubly Separable Spacetimes and Symmetry Constraints on their Self-Gravitating Matter Content
A popular approach to constructing exact stationary and axisymmetric nonvacuum solutions in general relativity has been to use solution-generating techniques. Here we revisit a recent variant of the Newman-Janis-Azreg-Ainou algorithm, restricted to asymptotically-flat spacetimes, and demonstrate that this method exclusively generates Konoplya-Stuchlik-Zhidenko spacetimes. Therefore, the equations for geodesic motion and scalar-wave propagation are both separable. We call these "doubly separable…

Involution on the Graded Grothendieck Ring of Varieties and $\mathbb{D}$-Singularities
Andrew Burke
https://arxiv.org/abs/2508.17587 https://arxiv.org/pdf/…

Involution on the Graded Grothendieck Ring of Varieties and $\mathbb{D}$-Singularities
We realize a graded variant $K_0(Var_k^{dim})$ of the Grothendieck ring of varieties as a quadratic extension of the subring $K_0(Var_k^{sp})$ spanned by classes of smooth and proper varieties. As such, there exists a natural involution $\mathbb{D}$ on $K_0(Var_k^{dim})$. We show that $\mathbb{D}$ commutes with the symmetric power operations $Sym^m$ up to zero divisors. Moreover, we study varieties which are smooth up to cut-and-paste relations, which we call $\mathbb{D}$-singular varieties, an…

Towards Constant Time Multi-Call Rumor Spreading on Small-Set Expanders
Emilio Cruciani, Sebastian Forster, Tijn de Vos
https://arxiv.org/abs/2508.18017 https://

Towards Constant Time Multi-Call Rumor Spreading on Small-Set Expanders
We study a multi-call variant of the classic PUSH&PULL rumor spreading process where nodes can contact $k$ of their neighbors instead of a single one during both PUSH and PULL operations. We show that rumor spreading can be made faster at the cost of an increased amount of communication between the nodes. As a motivating example, consider the process on a complete graph of $n$ nodes: while the standard PUSH&PULL protocol takes $Θ(\log n)$ rounds, we prove that our $k$-PUSH&PULL variant complet…

A Comparative Study of NAFNet Baselines for Image Restoration
Vladislav Esaulov, M. Moein Esfahani
https://arxiv.org/abs/2506.19845 https://

A Comparative Study of NAFNet Baselines for Image Restoration
We study NAFNet (Nonlinear Activation Free Network), a simple and efficient deep learning baseline for image restoration. By using CIFAR10 images corrupted with noise and blur, we conduct an ablation study of NAFNet's core components. Our baseline model implements SimpleGate activation, Simplified Channel Activation (SCA), and LayerNormalization. We compare this baseline to different variants that replace or remove components. Quantitative results (PSNR, SSIM) and examples illustrate how each m…

CFP: Kunstbäume in Text und Bild der Vormoderne 2.0. – Kommunikation in ökologischen Verflechtungen, Frankfurt am Main (13.07.2025)
https://ift.tt/5IP1Dab
TOC: Dutch Crossing: Journal of Low Countries Studies, vol. 46, no. 3 (March 2022) Dutch…
via Input 4 RELCFP