Weak regularity of Gauss mass transport

Details Weak regularity of Gauss mass transport Weak regularity of Gauss mass transport

2009-04-12

arxiv.org/abs/0904.1852v3

Mathematics

Functional Analysis

31 pages; 40 references; new result on Sobolev estimates is added

Scientific paper

Given two probability measures $\mu$ and $\nu$ we consider a mass transportation mapping $T$ satisfying 1) $T$ sends $\mu$ to $\nu$, 2) $T$ has the form $T = \phi \frac{\nabla \phi}{|\nabla \phi|}$, where $\phi$ is a function with convex sublevel sets. We prove a change of variables formula for $T$. We also establish Sobolev estimates for $\phi$, and a new form of the parabolic maximum principle. In addition, we discuss relations to the Monge-Kantorovich problem, curvature flows theory, and parabolic nonlinear PDE's.

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