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arXiv math/0503574math.AP
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反自对偶拉格朗日算子II:无界非自伴算子与发展方程

Anti-selfdual Lagrangians II: Unbounded non self-adjoint operators and evolution equations

Nassif Ghoussoub, Leo Tzou

摘要:

本文是[13]的继续,其中基于反自对偶(ASD)拉格朗日量的概念引入了新的变分原理。我们继续在这里的程序,使用这些拉格朗日提供变分配方和决议的各种基本方程和演变,通常不适合在欧拉-拉格朗日框架。特别是,我们认为固定方程的形式$ -Au\in \partial ϕ(u)$以及i耗散演化的形式$-\dot{u}(t)-A_t u(t)+ωu(t) \in \partial ϕ(t, u(t))$是$ϕ$是一个凸势的无限维空间。本文着重讨论了微分算子不一定有界的情形,从而完善了文[13]中关于有界线性算子的结果。我们的主要应用是处理各种非线性边值问题和抛物型初值方程所支配的迁移算子有或没有扩散项。

英文摘要:

This paper is a continuation of [13], where new variational principles were introduced based on the concept of anti-selfdual (ASD) Lagrangians. We continue here the program of using these Lagrangians to provide variational formulations and resolutions to various basic equations and evolutions which do not normally fit in the Euler-Lagrange framework. In particular, we consider stationary equations of the form $ -Au\in \partial ϕ(u)$ as well as i dissipative evolutions of the form $-\dot{u}(t)-A_t u(t)+ωu(t) \in \partial ϕ(t, u(t))$ were $ϕ$ is a convex potential on an infinite dimensional space. In this paper, the emphasis is on the cases where the differential operators involved are not necessarily bounded, hence completing the results established in [13] for bounded linear operators. Our main applications deal with various nonlinear boundary value problems and parabolic initial value equations governed by the transport operator with or without a diffusion term.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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