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arXiv · 2507.19277

Fully nonlinear parabolic fixed transmission problems

David Jesus·María Soria-Carro
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Abstract

We consider transmission problems for parabolic equations governed by distinct fully nonlinear operators on each side of a time-dependent interface. We prove that if the interface is $C^{1,\alpha}$, in the parabolic sense, then viscosity solutions are piecewise $C^{1,\alpha}$ up to the interface. As byproducts, we obtain a new ABP-Krylov-Tso estimate, and establish existence, uniqueness, a comparison principle, and regularity results for the flat interface problem.

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David Jesus, María Soria-Carro. 2025-07-25. Fully nonlinear parabolic fixed transmission problems. https://arxiv.org/abs/2507.19277

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