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arXiv 1306.0748math.AP
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一类非线性degenerate parabolic equations的大时间行为

Large time behavior for some nonlinear degenerate parabolic equations

Olivier Ley, Vinh Duc Nguyen

摘要:

研究非线性退化抛物方程在周期背景下Lipschitz连续解的渐近性态。我们的结果适用于一大类Hamilton-Jacobi-Bellman方程。定义S为扩散消失的集合,即,当方程是完全退化的时,我们得到了当方程在S外是一致抛物的,并且在S上,Hamilton算子是严格凸的或者满足类似于Barles-Souganstan(2000)对一阶Hamilton-Jacobi方程所作的假设时的收敛性.后一种假设允许处理具有非凸哈密顿算子的方程。我们也可以在S之外释放一致抛物线要求。作为结果,我们证明了一些处处退化的二阶方程的收敛性。

英文摘要:

We study the asymptotic behavior of Lipschitz continuous solutions of nonlinear degenerate parabolic equations in the periodic setting. Our results apply to a large class of Hamilton-Jacobi-Bellman equations. Defining S as the set where the diffusion vanishes, i.e., where the equation is totally degenerate, we obtain the convergence when the equation is uniformly parabolic outside S and, on S, the Hamiltonian is either strictly convex or satisfies an assumption similar of the one introduced by Barles-Souganidis (2000) for first-order Hamilton-Jacobi equations. This latter assumption allows to deal with equations with nonconvex Hamiltonians. We can also release the uniform parabolic requirement outside S. As a consequence, we prove the convergence of some everywhere degenerate second-order equations.

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