Supercaloric functions for the parabolic p-Laplace equation in the fast diffusion case

Author:

Giri Ratan Kr.,Kinnunen Juha,Moring Kristian

Abstract

AbstractWe study a generalized class of supersolutions, so-called p-supercaloric functions, to the parabolic p-Laplace equation. This class of functions is defined as lower semicontinuous functions that are finite in a dense set and satisfy the parabolic comparison principle. Their properties are relatively well understood for $$p\ge 2$$ p 2 , but little is known in the fast diffusion case $$1<p<2$$ 1 < p < 2 . Every bounded p-supercaloric function belongs to the natural Sobolev space and is a weak supersolution to the parabolic p-Laplace equation for the entire range $$1<p<\infty $$ 1 < p < . Our main result shows that unbounded p-supercaloric functions are divided into two mutually exclusive classes with sharp local integrability estimates for the function and its weak gradient in the supercritical case $$\frac{2n}{n+1}<p<2$$ 2 n n + 1 < p < 2 . The Barenblatt solution and the infinite point source solution show that both alternatives occur. Barenblatt solutions do not exist in the subcritical case $$1<p\le \frac{2n}{n+1}$$ 1 < p 2 n n + 1 and the theory is not yet well understood.

Funder

Aalto University

Publisher

Springer Science and Business Media LLC

Subject

Applied Mathematics,Analysis

Cited by 2 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Elliptic Harnack's inequality for a singular nonlinear parabolic equation in non‐divergence form;Bulletin of the London Mathematical Society;2022-10-27

2. Weighted L p -type regularity estimates for nonlinear parabolic equations with Orlicz growth;Electronic Journal of Qualitative Theory of Differential Equations;2022

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