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arXiv · 2005.01248

Equivalence between distributional and viscosity solutions for the double-phase equation

Yuzhou Fang·Chao Zhang
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Abstract

We investigate the different notions of solutions to the double-phase equation $$ -\dive(|Du|^{p-2}Du+a(x)|Du|^{q-2}Du)=0, $$ which is characterized by the fact that both ellipticity and growth switch between two different types of polynomial according to the position. We introduce the $\mathcal{A}_{H(\cdot)}$-harmonic functions of nonlinear potential theory, and then show that $\mathcal{A}_{H(\cdot)}$-harmonic functions coincide with the distributional and viscosity solutions, respectively. This implies that the distributional and viscosity solutions are exactly the same.

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Yuzhou Fang, Chao Zhang. 2020-05-04. Equivalence between distributional and viscosity solutions for the double-phase equation. https://arxiv.org/abs/2005.01248

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