Regularity of the Free Boundary for a Bernoulli-Type Parabolic Problem with Variable Coefficients
Abstract
This paper studies the regularity of the free boundary for viscosity solutions to a parabolic Bernoulli-type free boundary problem with variable coefficients. The main result is that Lipschitz free boundaries are C1 with a normal vector that varies with a H\"older modulus of continuity in both space and in time. As a consequence, the viscosity solution satisfies the free boundary problem in a classical sense.
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