2022-05-22T16:52:32Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/825422021-10-14T01:45:26Zhdl_2115_45007hdl_2115_116Continuity of derivatives of a convex solution to a perturbed one-Laplace equation by p-LaplacianGiga, YoshikazuTsubouchi, Shuntaro410We consider a one-Laplace equation perturbed by p-Laplacian with 1 < p < ∞. We prove that a weak solution is continuously differentiable (C1) if it is convex. Note that similar result fails to hold for the unperturbed one-Laplace equation. The main difficulty is to show C1-regularity of the solution at the boundary of a facet where the gradient of the solution vanishes. For this purpose we blow-up the solution and prove that its limit is a constant function by establishing a Liouville-type result, which is proved by showing a strong maximum principle. Our argument is rather elementary since we assume that the solution is convex. A few generalization is also discussed.Department of Mathematics, Hokkaido UniversityDepartmental Bulletin Paperapplication/pdfhttp://hdl.handle.net/2115/82542info:doi/10.14943/99357https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/82542/1/ConDerConvex.pdfHokkaido University Preprint Series in Mathematics11371292021-08-30engpublisher