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arXiv 1609.09692math.AP
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具有超二次梯度项的完全非线性抛物型方程边界条件的损失

Loss of boundary conditions for fully nonlinear parabolic equations with superquadratic gradient terms

Alexander Quaas, Andrei Rodríguez

摘要:

我们研究一个完全非线性的,一致抛物型方程的解与超二次增长的梯度满足初始和齐次边界条件在经典意义下,一个问题,我们称之为经典的狄利克雷问题。我们的主要结果是:这个问题的全局时间解的不存在性取决于初始数据上的特定大值条件,并且对于直到边界的初始数据$C^1$存在局部时间解。当边界条件在粘性意义下被理解时,整体存在性就被知道了,这被称为广义狄利克雷问题。因此,我们的结果意味着在有限时间内边界条件的损失。具体地说,满足粘性意义下的齐次边界条件的解最终在边界的某个点变为严格正的。

英文摘要:

We study whether the solutions of a fully nonlinear, uniformly parabolic equation with superquadratic growth in the gradient satisfy initial and homogeneous boundary conditions in the classical sense, a problem we refer to as the classical Dirichlet problem. Our main results are: the nonexistence of global-in-time solutions of this problem, depending on a specific largeness condition on the initial data, and the existence of local-in-time solutions for initial data $C^1$ up to the boundary. Global existence is know when boundary conditions are understood in the viscosity sense, what is known as the generalized Dirichlet problem. Therefore, our result implies loss of boundary conditions in finite time. Specifically, that a solution satisfying homogeneous boundary conditions in the viscosity sense eventually becomes strictly positive at some point of the boundary.

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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