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We study stochastic second-order methods for solving general non-convex optimization problems. We propose using a special version of momentum to stabilize the stochastic gradient and Hessian estimates in Newton's method. We show that…

最优化与控制 · 数学 2025-06-27 El Mahdi Chayti , Nikita Doikov , Martin Jaggi

In this paper, we prove the stochastic homogenization of certain nonconvex Hamilton-Jacobi equations. The nonconvex Hamiltonians, which are generally uneven and inseparable, are generated by a sequence of quasiconvex Hamiltonians and a…

偏微分方程分析 · 数学 2018-03-26 Hongwei Gao

In our contribution we study stochastic models in one space dimension with two conservation laws. One model is the coupled continuum stochastic Burgers equation, for which each current is a sum of quadratic non-linearities, linear…

统计力学 · 物理学 2024-01-15 Dipankar Roy , Abhishek Dhar , Konstantin Khanin , Manas Kulkarni , Herbert Spohn

This paper is concerned with homogenization of systems of linear elasticity with rapidly oscillating periodic coefficients. We establish sharp convergence rates in $L^2$ for the mixed boundary value problems with bounded measurable…

偏微分方程分析 · 数学 2017-02-14 Zhongwei Shen , Jinping Zhuge

This paper addresses the complexity reduction of stochastic homogenisation of a class of random materials for a stationary diffusion equation. A cost-efficient approximation of the correctors is built using a method designed to exploit…

数值分析 · 数学 2022-03-25 Quentin Ayoul-Guilmard , Anthony Nouy , Christophe Binetruy

We review the mathematical formalism underlying the modelling of stochasticity in biological systems. Beginning with a description of the system in terms of its basic constituents, we derive the mesoscopic equations governing the dynamics…

种群与进化 · 定量生物学 2012-11-05 Alan J. McKane , Tommaso Biancalani , Tim Rogers

In this work, we deal with the stochastic counterpart of the nonlocal Cahn-Hilliard equation with regular potential in a smooth bounded one-, two- or three-dimensional domain. The problem is endowed with homogeneous Neumann boundary…

偏微分方程分析 · 数学 2026-04-29 Andrea Di Primio , Christoph Hurm

In this paper, we study the long-time stability behavior of a class of linear stochastic evolution equations in a Hilbert space with multiplicative noise. Explicit sufficient conditions for $p$-th moment and almost sure exponential…

偏微分方程分析 · 数学 2026-05-21 Abdellatif Elgrou , Abdelaziz Rhandi , Jawad Salhi

This work is devoted to examine the uniqueness and existence of kinetic solutions for a class of scalar conservation laws involving a nonlocal super-critical diffusion operator and a multiplicative noise. Our proof for uniqueness is based…

偏微分方程分析 · 数学 2017-02-23 Lv Guangying , Gao Hongjun , Wei Jinlong

We present a proof of qualitative stochastic homogenization for a nonconvex Hamilton-Jacobi equation. The new idea is to introduce a family of "sub-equations" and to control solutions of the original equation by the maximal subsolutions of…

偏微分方程分析 · 数学 2013-11-11 Scott N. Armstrong , Hung V. Tran , Yifeng Yu

In this note we study the 2d stochastic quasi-geostrophic equation in $\mathbb{T}^2$ for general parameter $\alpha\in (0,1)$ and multiplicative noise. We prove the existence of martingale solutions and pathwise uniqueness under some…

概率论 · 数学 2018-06-18 Michael Röckner , Rongchan Zhu , Xiangchan Zhu

We propose and analyse a novel, fully discrete numerical algorithm for the approximation of the generalised Stokes system forced by transport noise -- a prototype model for non-Newtonian fluids including turbulence. Utilising the Gradient…

数值分析 · 数学 2024-12-20 Jerome Droniou , Kim-Ngan Le , Jörn Wichmann

Stochastic fluid dynamics governs the long time tails of hydrodynamic correlation functions, and the critical slowing down of relaxation phenomena in the vicinity of a critical point in the phase diagram. In this work we study the role of…

高能物理 - 理论 · 物理学 2021-02-03 Jingyi Chao , Thomas Schaefer

We study in this paper the periodic homogenization problem related to a strongly nonlinear reaction-diffusion equation. Owing to the large reaction term, the homogenized equation has a rather quite different form which puts together both…

偏微分方程分析 · 数学 2012-05-01 Nils Svanstedt , Jean Louis Woukeng

Through certain appropriate constructions, we establish periodic solutions in distribution for some stochastic differential equations with infinite-dimensional Levy noise. Additionally, we obtain the corresponding periodic measures and…

概率论 · 数学 2024-12-24 Xinying Deng , Yong Li , Xue Yang

In this paper, we extend Walsh's stochastic integral with respect to a Gaussian noise, white in time and with some homogeneous spatial correlation, in order to be able to integrate some random measure-valued processes. This extension turns…

概率论 · 数学 2007-05-23 David Nualart , Lluis Quer-Sardanyons

We study an extended system that without noise shows a spatially homogeneous state, but when submitted to an adequate multiplicative noise, some "noise-induced patterns" arise. The stochastic resonance between these structures is…

斑图形成与孤子 · 物理学 2013-05-29 B. von Haeften , G. Izús , S. Mangioni , A. D. Sánchez , H. S. Wio

A stochastic linear transport equation with multiplicative noise is considered and the question of no-blow-up is investigated. The drift is assumed only integrable to a certain power. Opposite to the deterministic case where smooth initial…

概率论 · 数学 2013-03-19 Ennio Fedrizzi , Franco Flandoli

Aggregation processes with an arbitrary number of conserved quantities are investigated. On the mean-field level, an exact solution for the size distribution is obtained. The asymptotic form of this solution exhibits nontrivial ``double''…

凝聚态物理 · 物理学 2009-10-28 P. L. Krapivsky , E. Ben-Naim

The evolution Stokes equation in a perforated domain subject to Fourier boundary condition on the boundaries of the holes is considered. We assume that the dynamic is driven by a stochastic perturbation on the interior of the domain and…

偏微分方程分析 · 数学 2014-04-08 Hakima Bessaih , Yalchin Efendiev , Florian Maris