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arXiv · 2610.06537

Interior Regularity of Mixed Local-Nonlocal Parabolic Semilinear Equations

Sergio Junquera·Leandro M. Del Pezzo
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Abstract

In this paper we prove the existence, uniqueness and regularity of classical solutions \break of a semilinear parabolic equation with a mixed local and nonlocal diffusion operator \break $\mathcal{L} = -(-Δ)^s + Δ$ and Dirichlet boundary conditions. Here, $(-Δ)^s$ is the integral fractional laplacian and $Δ$ is the classic local laplacian. We then study the interior regularity of said solutions and conclude that they are Hölder continuous in both space and time, and they are $C^{2,α}_{loc}$ in space for all positive times.

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Sergio Junquera, Leandro M. Del Pezzo. 2026-10-05. Interior Regularity of Mixed Local-Nonlocal Parabolic Semilinear Equations. https://arxiv.org/abs/2610.06537

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