Mathematics – Analysis of PDEs
Scientific paper
2011-07-06
Mathematics
Analysis of PDEs
12 pages, 3 figures
Scientific paper
Given a convex set and an interior point close to the boundary, we prove the
existence of a supporting hyperplane whose distance to the point is controlled,
in a dimensionally quantified way, by the thickness of the convex set in the
orthogonal direction. This result has important applications in the regularity
theory for Monge-Amp\`ere type equations arising in optimal transportation.
Figalli Alessio
Kim Young-Heon
McCann Robert J.
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