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Bernstein-type techniques for 2D free boundary graphs
Authors:Daniela De Silva
Affiliation:(1) Department of Mathematics, Barnard College, Columbia University, New York, NY 10027, USA
Abstract:We prove an a priori bound for the Lipschitz constant of a smooth one-phase free boundary graph F(u) in two dimensions. The function u satisfies an elliptic equation in its positive side, and $$|nabla u| = 1$$ on F(u).
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