{"title":"集体行为无压水动力模型基态的全局实时稳定性","authors":"Piotr B. Mucha, Wojciech S. Ożański","doi":"10.4310/cms.2023.v21.n7.a9","DOIUrl":null,"url":null,"abstract":"We consider a pressureless hydrodynamic model of collective behaviour, which is concerned with a density function $\\rho$ and a velocity field $v$ on the torus, and is described by the continuity equation for $\\rho$, $\\partial_t \\rho + \\mathrm{div} (v\\rho )=0$, and a compressible hydrodynamic equation for $v$, $\\rho v_t + \\rho v\\cdot \\nabla v - \\Delta v = -\\rho \\nabla K \\rho$ with a forcing modelling collective behaviour related to the density $\\rho$, where $K$ stands for the interaction potential, defined as the solution to the Poisson equation on $\\mathbb{T}^d$. We show global-in-time stability of the ground state $(\\rho , v)=(1,0)$ if the perturbation $(\\rho_0-1 ,v_0)$ satisfies $\\| v_0 \\|_{B^{d/p-1}_{p,1}(\\mathbb{T}^d )} + \\| \\rho_0-1 \\|_{B^{d/p}_{p,1}(\\mathbb{T}^d )} \\leq \\epsilon$ for sufficiently small $\\epsilon>0$.","PeriodicalId":50659,"journal":{"name":"Communications in Mathematical Sciences","volume":"110 1","pages":"0"},"PeriodicalIF":1.2000,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Global-in-time stability of ground states of a pressureless hydrodynamic model of collective behaviour\",\"authors\":\"Piotr B. Mucha, Wojciech S. Ożański\",\"doi\":\"10.4310/cms.2023.v21.n7.a9\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We consider a pressureless hydrodynamic model of collective behaviour, which is concerned with a density function $\\\\rho$ and a velocity field $v$ on the torus, and is described by the continuity equation for $\\\\rho$, $\\\\partial_t \\\\rho + \\\\mathrm{div} (v\\\\rho )=0$, and a compressible hydrodynamic equation for $v$, $\\\\rho v_t + \\\\rho v\\\\cdot \\\\nabla v - \\\\Delta v = -\\\\rho \\\\nabla K \\\\rho$ with a forcing modelling collective behaviour related to the density $\\\\rho$, where $K$ stands for the interaction potential, defined as the solution to the Poisson equation on $\\\\mathbb{T}^d$. We show global-in-time stability of the ground state $(\\\\rho , v)=(1,0)$ if the perturbation $(\\\\rho_0-1 ,v_0)$ satisfies $\\\\| v_0 \\\\|_{B^{d/p-1}_{p,1}(\\\\mathbb{T}^d )} + \\\\| \\\\rho_0-1 \\\\|_{B^{d/p}_{p,1}(\\\\mathbb{T}^d )} \\\\leq \\\\epsilon$ for sufficiently small $\\\\epsilon>0$.\",\"PeriodicalId\":50659,\"journal\":{\"name\":\"Communications in Mathematical Sciences\",\"volume\":\"110 1\",\"pages\":\"0\"},\"PeriodicalIF\":1.2000,\"publicationDate\":\"2023-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Communications in Mathematical Sciences\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.4310/cms.2023.v21.n7.a9\",\"RegionNum\":4,\"RegionCategory\":\"数学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATHEMATICS, APPLIED\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Communications in Mathematical Sciences","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.4310/cms.2023.v21.n7.a9","RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATHEMATICS, APPLIED","Score":null,"Total":0}
Global-in-time stability of ground states of a pressureless hydrodynamic model of collective behaviour
We consider a pressureless hydrodynamic model of collective behaviour, which is concerned with a density function $\rho$ and a velocity field $v$ on the torus, and is described by the continuity equation for $\rho$, $\partial_t \rho + \mathrm{div} (v\rho )=0$, and a compressible hydrodynamic equation for $v$, $\rho v_t + \rho v\cdot \nabla v - \Delta v = -\rho \nabla K \rho$ with a forcing modelling collective behaviour related to the density $\rho$, where $K$ stands for the interaction potential, defined as the solution to the Poisson equation on $\mathbb{T}^d$. We show global-in-time stability of the ground state $(\rho , v)=(1,0)$ if the perturbation $(\rho_0-1 ,v_0)$ satisfies $\| v_0 \|_{B^{d/p-1}_{p,1}(\mathbb{T}^d )} + \| \rho_0-1 \|_{B^{d/p}_{p,1}(\mathbb{T}^d )} \leq \epsilon$ for sufficiently small $\epsilon>0$.
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