On the microscopic spacetime convexity principle for fully nonlinear parabolic equations I: Spacetime convex solutions

preprint2014arXivOpen access

Abstract

Spacetime convexity is a basic geometric property of the solutions of parabolic equations. In this paper, we study microscopic convexity properties of spacetime convex solutions of fully nonlinear parabolic partial differential equations and give a new simple proof of the constant rank theorem in \cite{CH13}.

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