Very Degenerate Elliptic Equations Under Almost Critical Sobolev Regularity
FORUM MATHEMATICUM(2020)
摘要
We prove the local Lipschitz continuity and the higher differentiability of local minimizers of functionals of the formF(u, Omega) = integral(Omega)(F(x, Du(x)) + f(x)) . u(x))dxwith non-autonomous integrand F(x, xi) which is degenerate convex with respect to the gradient variable. The main novelty here is that the results are obtained assuming that the partial map x bar right arrow D xi F(x, xi) has weak derivative in the almost critical Zygmund class L-n log(alpha) L and the datum f is assumed to belong to the same Zygmund class.
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关键词
Degenerate convex functionals, Lipschitz regularity, higher differentiability
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