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Generative diffusion models have achieved remarkable success in producing high-quality images. However, these models typically operate in continuous intensity spaces, diffusing independently across pixels and color channels. As a result,…

图形学 · 计算机科学 2025-05-20 Javier E. Santos , Agnese Marcato , Roman Colman , Nicholas Lubbers , Yen Ting Lin

In the context of the Kuramoto model of coupled oscillators with distributed natural frequencies interacting through a time-delayed mean-field, we derive as a function of the delay exact results for the stability boundary between the…

适应与自组织系统 · 物理学 2019-05-22 David Métivier , Shamik Gupta

Stochastic resetting has emerged as a powerful mechanism for driving systems into nonequilibrium stationary states with tunable properties. While most existing studies focus on global resetting, where all degrees of freedom are…

统计力学 · 物理学 2026-04-07 Rupak Majumder , Anish Acharya , Shamik Gupta

We investigate Turing instability and pattern formation in two-dimensional domains for two reaction-diffusion models, obtained as diffusive limits of kinetic equations for mixtures of monatomic and polyatomic gases. The first model is of…

数学物理 · 物理学 2026-02-23 Stefano Boccelli , Giorgio Martalò , Romina Travaglini

The existence of global weak solutions to the cross-diffusion model of Shigesada, Kawasaki, and Teramoto for an arbitrary number of species is proved. The model consists of strongly coupled parabolic equations for the population densities…

偏微分方程分析 · 数学 2022-07-21 Xiuqing Chen , Ansgar Jüngel , Lei Wang

We establish global-in-time existence results for thermodynamically consistent reaction-(cross-)diffusion systems coupled to an equation describing heat transfer. Our main interest is to model species-dependent diffusivities, while at the…

偏微分方程分析 · 数学 2022-02-11 Julian Fischer , Katharina Hopf , Michael Kniely , Alexander Mielke

The consistency across scales of a recently developed mathematical thermodynamic structure, between a continuous stochastic nonlinear dynamical system (diffusion process with Langevin or Fokker-Planck equations) and its emergent discrete,…

统计力学 · 物理学 2015-10-28 Moises Santillan , Hong Qian

The emergence of stable disordered patterns in reactive system on spatially homogenous substrate is studied in the context of vegetation patterns in the semi-arid climatic zone. It is shown that reaction-diffusion systems that allow for…

斑图形成与孤子 · 物理学 2009-11-11 Alon Manor , Nadav M. Shnerb

We develop a formally exact technique for obtaining steady-state distributions of non-interacting active Brownian particles in a variety of systems. Our technique draws on results from the theory of two-way diffusion equations to solve the…

软凝聚态物质 · 物理学 2017-04-06 Caleb G. Wagner , Michael F. Hagan , Aparna Baskaran

In this paper, we study the inertial Kuramoto-Sakaguchi equation for interacting oscillatory systems. On the one hand, we prove the convergence toward corresponding phase-homogeneous stationary states in weighted Lebesgue norm sense when…

偏微分方程分析 · 数学 2025-11-07 Francis Filbet , Myeongju Kang

In a scalar reaction-diffusion equation, it is known that the stability of a steady state can be determined from the Maslov index, a topological invariant that counts the state's critical points. In particular, this implies that pulse…

We solve a longstanding stability problem for the Kuramoto model of coupled oscillators. This system has attracted mathematical attention, in part because of its applications in fields ranging from neuroscience to condensed-matter physics,…

斑图形成与孤子 · 物理学 2009-11-13 Renato Mirollo , Steven H. Strogatz

In this work, we investigate a reaction-diffusion system in which both species are influenced by self-diffusion. Due to Hopf's boundary lemma, we obtain the boundedness of the classical solution of the system. By considering a particular…

偏微分方程分析 · 数学 2024-04-22 Ningning Zhu , Dongpo Hu , Huili Bi

The study of pattern-forming instabilities in reaction-diffusion systems on growing or otherwise time-dependent domains arises in a variety of settings, including applications in developmental biology, spatial ecology, and experimental…

斑图形成与孤子 · 物理学 2022-07-11 Robert A. Van Gorder , Václav Klika , Andrew L. Krause

Diffusion-limited association reactions are ubiquitous in nature. They are particularly important for biological reactions, where the reaction rates are often determined by the diffusive transport of the molecules on two-dimensional…

软凝聚态物质 · 物理学 2020-10-06 Sumantra Sarkar

Model-based prediction of stochastic noise in biomolecular reactions often resorts to approximation with unknown precision. As a result, unexpected stochastic fluctuation causes a headache for the designers of biomolecular circuits. This…

分子网络 · 定量生物学 2018-08-07 Yuta Sakurai , Yutaka Hori

The reaction-diffusion master equation (RDME) is a lattice stochastic reaction-diffusion model that has been used to study spatially distributed cellular processes. The RDME is often interpreted as an approximation to spatially-continuous…

数值分析 · 数学 2013-08-05 Samuel A Isaacson

We prove that the steady state of a class of multidimensional reaction-diffusion systems is asymptotically stable at the intersection of unweighted space and exponentially weighted Sobolev spaces, and pay particular attention to a special…

偏微分方程分析 · 数学 2022-05-06 Qingxia Li , Xinyao Yang

The reaction-diffusion master equation (RDME) is commonly used to model processes where both the spatial and stochastic nature of chemical reactions need to be considered. We show that the RDME in many cases is inconsistent with a…

定量方法 · 定量生物学 2009-05-29 Paul Sjoberg , Otto G Berg , Johan Elf

Understanding the asymptotic behavior of reaction-diffusion (RD) systems is crucial for modeling processes ranging from species coexistence in ecology to biochemical interactions within cells. In this work, we analyze RD systems in which…

动力系统 · 数学 2025-02-18 Carlos Barajas , Jean-Jacques Slotine , Domitilla Del Vecchio