Interaction between nonlinear diffusion and mean curvature of a surface with initial discontinuities
Year: 2026
Type: preprint
Abstract: We consider the Cauchy problems for a class of nonlinear diffusion equations where each initial data is given by a characteristic function of an open set $Ω$ in the whole Euclidean space. If the boundary $\partialΩ$ is of class of $C^2$ in a neighborhood of a point $x$ on it, then we extract the mean curvature of $\partialΩ$ at $x$ from the initial diffusion at $x$. This corresponds to the author's previous result for the two-phase linear diffusion equation. Applications to some overdetermined problems for nonlinear diffusion equations are given.
Source: arXiv (Cornell University)
Author: Sakaguchi, Shigeru
Institution: Tohoku University
Language: English
Subfield: Applied Mathematics
Field: Mathematics
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7213264359