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arXiv 2008.12666math.AP
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流形上具有非齐次密度的degenerate parabolic equations方程Cauchy问题解的渐近性质

Asymptotic properties of solutions to the Cauchy problem for degenerate parabolic equations with inhomogeneous density on manifolds

Daniele Andreucci, Anatoli Tedeev

摘要:

考虑非紧黎曼流形上具有非齐次密度的双非线性退化抛物方程的Cauchy问题。我们给出了一个定性分类的行为的解决方案的问题取决于在无穷远处的密度函数的行为和几何形状的流形,这是描述在其等周函数。我们建立的解决方案的性质为:稳定的解决方案为零的大的时间,有限的传播速度,普遍的边界的解决方案,爆破的接口。当然,这些行为中的每一个都发生在适当的参数范围内,其定义涉及一个通用的几何特征函数,它既取决于流形的几何形状,也取决于无穷远处密度的渐近性。

英文摘要:

We consider the Cauchy problem for doubly nonlinear degenerate parabolic equations with inhomogeneous density on noncompact Riemannian manifolds. We give a qualitative classification of the behavior of the solutions of the problem depending on the behavior of the density function at infinity and the geometry of the manifold, which is described in terms of its isoperimetric function. We establish for the solutions properties as: stabilization of the solution to zero for large times, finite speed of propagation, universal bounds of the solution, blow up of the interface. Each one of these behaviors of course takes place in a suitable range of parameters, whose definition involves a universal geometrical characteristic function, depending both on the geometry of the manifold and on the asymptotics of the density at infinity.

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