Tootfinder

Mean-Variance Optimization and Algorithm for Finite-Horizon Markov Decision Processes
Li Xia, Zhihui Yu
https://arxiv.org/abs/2507.22327 https://arxiv.org/…

Mean-Variance Optimization and Algorithm for Finite-Horizon Markov Decision Processes
Multi-period mean-variance optimization is a long-standing problem, caused by the failure of dynamic programming principle. This paper studies the mean-variance optimization in a setting of finite-horizon discrete-time Markov decision processes (MDPs), where the objective is to maximize the combined metrics of mean and variance of the accumulated rewards at terminal stage. By introducing the concepts of pseudo mean and pseudo variance, we convert the original mean-variance MDP to a bilevel MDP,…

Ya es oficial: Lollapalooza Chile vuelve al Parque O'Higgins el 2026.
El festival se realizarš los días 13, 14 y 15 de marzo de 2026. La venta de entradas comienza el 12 de agosto a las 12:00 por Ticketmaster.
Mšs info: https://www.fu…

¡Qué semana! ¿cušnto falta?
#ViernesDeMemes

Während der Sommerferien bietet die Mediathek an zwei verschiedenen Terminen Pen-&-Paper-Rollenspiele an. [...] Am 22.08. von 15 bis 18 Uhr findet ein Abenteuer für alle ab 16 Jahren statt.
https://www.kamp-lintfort.de/de/veranstaltungen/phantastischer-fre…

Finanzamt will ne Steuererklärung für den Verein den ich liquidiere für 2021. Der Verein ist seit 2023 formell abgewickelt. Es existiert weder Büro noch eMail etc. Natürlich muss ich das mit ELSTER machen. Beantrage also neues Zertifikat mit der Steuernummer des Vereins. Sie fragen nur nach meiner eMail und schicken mir jetzt einen Brief ... da bin ich ja mal gespannt wo der wohl hingeht. Ich würde ja wetten an die nicht mehr existierende Adresse des Vereins. Für die es natürlich nach 3 Jahr…

Stable Cosmology from Minimal Theory of Mass-Varying Massive Gravity
Ahmad Khoirul Falah, Andy Octavian Latief, Husin Alatas, Bobby Eka Gunara
https://arxiv.org/abs/2507.21542 h…

Stable Cosmology from Minimal Theory of Mass-Varying Massive Gravity
We study cosmological perturbations in the minimal theory of mass-varying massive gravity (MTMVMG), a constrained extension of mass-varying massive gravity that propagates only three physical degrees of freedom. We show that MTMVMG admits a stable cosmological solutions i.e. free from ghost, gradient, and tachyonic instabilities around the homogeneous and isotropic background. We further demonstrate that the dynamical external scalar field$\textendash\textendash$which is responsible for the mas…

A Hybrid Stochastic Gradient Tracking Method for Distributed Online Optimization Over Time-Varying Directed Networks
Xinli Shi, Xingxing Yuan, Longkang Zhu, Guanghui Wen
https://arxiv.org/abs/2508.20645

A Hybrid Stochastic Gradient Tracking Method for Distributed Online Optimization Over Time-Varying Directed Networks
With the increasing scale and dynamics of data, distributed online optimization has become essential for real-time decision-making in various applications. However, existing algorithms often rely on bounded gradient assumptions and overlook the impact of stochastic gradients, especially in time-varying directed networks. This study proposes a novel Time-Varying Hybrid Stochastic Gradient Tracking algorithm named TV-HSGT, based on hybrid stochastic gradient tracking and variance reduction mechan…

a veces quisiera meterme al gym pero prefiero meterme en lo que no me importa
#ViernesDeMemes

Team Variance Optimization of n-Player Stochastic Games with Separately Controlled Chains
Li Xia
https://arxiv.org/abs/2507.22335 https://arxiv.org/pdf/250…

Team Variance Optimization of n-Player Stochastic Games with Separately Controlled Chains
In this paper, we study a subclass of n-player stochastic games, in which each player has their own internal state controlled only by their own action and their objective is a common goal called team variance which measures the total variation of the random rewards of all players. It is assumed that players cannot observe each others' state/action. Thus, players' internal chains are controlled separately by their own action and they are coupled through the objective of team variance. Since the …