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Recently I. Capuzzo Dolcetta, F. Leoni and A. Porretta obtain a very surprising regularity result for fully nonlinear, superquadratic, elliptic equations by showing that viscosity subsolutions of such equations are locally H\"older…

Analysis of PDEs · Mathematics 2011-12-22 Guy Barles

We prove the interior and global Lipschitz regularity results for a solution of fully nonlinear equations with $(p,q)$-growth. We prove that for a small gap $q-p$, a solution is locally or globally Lipschitz continuous. We also prove that a…

Analysis of PDEs · Mathematics 2026-05-18 Sun-Sig Byun , Hongsoo Kim

In this article we establish for the first time the $C^s$ boundary regularity of solutions to nonlocal elliptic equations with kernels $K(y)\asymp |y|^{-n-2s}$. This was known to hold only when $K$ is homogeneous, and it is quite surprising…

Analysis of PDEs · Mathematics 2024-03-13 Xavier Ros-Oton , Marvin Weidner

We obtain an explicit H\"older regularity result for viscosity solutions of a class of second order fully nonlinear equations leaded by operator that are neither convex/concave nor uniformly elliptic.

Analysis of PDEs · Mathematics 2021-03-09 Fausto Ferrari , Giulio Galise

We consider a wide class of fully nonlinear integro-differential equations that degenerate when the gradient of the solution vanishes. By using compactness and perturbation arguments, we give a complete characterization of the regularity of…

Analysis of PDEs · Mathematics 2024-08-29 Yuzhou Fang , Vicentiu D. Radulescu , Chao Zhang

In this paper we obtain interior regularity estimates for viscosity solutions of nonlocal Dirichlet problems that degenerate when the gradient of the solution vanishes. Interior H\"older estimates are obtained when the order of the…

Analysis of PDEs · Mathematics 2020-04-08 Disson Dos Prazeres , Erwin Topp

We consider the Dirichlet problem for quasilinear elliptic equations with Musielak-Orlicz (p,q)-growth and non-logarithmic conditions on the coefficients. A sufficient Wiener-type condition for the regularity of a boundary point is…

Analysis of PDEs · Mathematics 2021-09-20 Oleksandr V. Hadzhy , Mykhailo V. Voitovych

We consider viscosity solutions to non-homogeneous degenerate and singular parabolic equations of the $p$-Laplacian type and in non-divergence form. We provide local H\"older and Lipschitz estimates for the solutions. In the degenerate…

Analysis of PDEs · Mathematics 2018-09-11 Amal Attouchi

We establish interior Lipschitz regularity for solutions to anisotropic fully nonlinear equations with nonstandard growth, without imposing any restriction on the gap between the highest and lowest growth exponents. Our proof is based on an…

Analysis of PDEs · Mathematics 2025-07-09 Sun-Sig Byun , Hongsoo Kim

In this paper, we show $C^{2,\alpha}$ interior estimates for viscosity solutions of fully non-linear, uniformly elliptic equations, which are close to linear equations and we also compute an explicit bound for the closeness.

Analysis of PDEs · Mathematics 2021-09-28 Arunima Bhattacharya , Micah Warren

This paper concerns a study of the pointwise behaviour of positive solutions to certain quasi-linear elliptic equations with natural growth terms, under minimal regularity assumptions on the underlying coefficients. Our primary results…

Analysis of PDEs · Mathematics 2015-05-28 Benjamin J. Jaye , Igor E. Verbitsky

In this paper, we consider a kind of degenerate normalized $p$-Laplacian equation with general variable exponents. We establish local $C^{1,\alpha'}$ regularity of viscosity solutions by making use of the compactness argument, scaling…

Analysis of PDEs · Mathematics 2025-08-04 Jiangwen Wang , Yunwen Yin , Feida Jiang

In the present paper, a class of fully non-linear elliptic equations are considered, which are degenerate as the gradient becomes small. H\"older estimates obtained by the first author (2011) are combined with new Lipschitz estimates…

Analysis of PDEs · Mathematics 2012-11-27 Cyril Imbert , L. Silvestre

We establish the density of the partial regularity result in the class of continuous viscosity solutions. Given a fully nonlinear equation, we prove the existence of a sequence entitled to the partial regularity result, approximating its…

Analysis of PDEs · Mathematics 2020-10-29 Disson dos Prazeres , Edgard A. Pimentel , Giane C. Rampasso

In this work, we study regularity properties for nonvariational singular elliptic equations ruled by the infinity Laplacian. We obtain optimal $C^{1,\alpha}$ regularity along the free boundary. We also show existence of solutions,…

Analysis of PDEs · Mathematics 2022-05-18 Damião J. Araújo , Ginaldo de Santana Sá

We prove Harnack inequality and local regularity results for weak solutions of a quasilinear degenerate equation in divergence form under natural growth conditions. The degeneracy is given by a suitable power of a strong $A_\infty$ weight.…

Analysis of PDEs · Mathematics 2010-10-05 Giuseppe Di Fazio , Maria Stella Fanciullo , Piero Zamboni

In this paper, we establish an optimal global Calder\'{o}n-Zygmund type estimate for the viscosity solution to the Dirichlet boundary problem of fully nonlinear elliptic equations with possibly nonconvex nonlinearities. We prove that the…

Analysis of PDEs · Mathematics 2025-12-23 Sun-Sig Byun , Jeongmin Han , Mikyoung Lee

We give pointwise gradient bounds for solutions of (possibly non-uniformly) elliptic partial differential equations in the entire Euclidean space. The operator taken into account is very general and comprises also the singular and…

Analysis of PDEs · Mathematics 2019-03-13 Cecilia Cavaterra , Serena Dipierro , Alberto Farina , Zu Gao , Enrico Valdinoci

We prove the existence and $C^{1,\alpha}$ regularity of solutions to nonlocal fully nonlinear elliptic double obstacle problems. We also obtain boundary regularity for these problems. The obstacles are assumed to be Lipschitz…

Analysis of PDEs · Mathematics 2021-05-21 Mohammad Safdari

We establish a new oscillation estimate for solutions of nonlinear partial differential equations of elliptic, degenerate type. This new tool yields a precise control on the growth rate of solutions near their set of critical points, where…

Analysis of PDEs · Mathematics 2020-01-03 Damião J. Araújo , Eduardo V. Teixeira , José Miguel Urbano