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arXiv 1602.03522math.APmath-phmath.CAmath.MP
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非线性非局部扩散方程的一个强最大值原理

A strong maximum principle for nonlinear nonlocal diffusion equations

Ravi Shankar, Tucker Hartland

摘要:

研究了一类非局部非线性扩散方程。对非局部含时狄利克雷问题提出了一个强最大值原理.结果是对有界函数的空间,而不是(半)-连续函数。达到内部全局极值的解必须是同平凡的。然而,根据非线性,平凡解在空间中可能不是常数;例如,它们可能有无限多个不连续点。我们给出了不同非线性的非常数平凡解的例子。对于多孔介质型方程,这些函数不能求解相关的经典微分方程,即使是弱形式的微分方程。我们还表明,这些问题是全球适定的Lipschitz,非负扩散系数。

英文摘要:

This is a study of a class of nonlocal nonlinear diffusion equations. We present a strong maximum principle for nonlocal time-dependent Dirichlet problems. Results are for bounded functions of space, rather than (semi)-continuous functions. Solutions that attain interior global extrema must be identically trivial. However, depending on the nonlinearity, trivial solutions may not be constant in space; they may have an infinite number of discontinuities, for example. We give examples of nonconstant trivial solutions for different nonlinearities. For porous medium-type equations, these functions do not solve the associated classical differential equations, even those in weak form. We also show that these problems are globally wellposed for Lipschitz, nonnegative diffusion coefficients.

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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