activity
20242026
collaborators

9 papers

math.AP2026

A priori estimates for solutions of degenerate fully nonlinear elliptic equations with data

Hongsoo Kim, Se-Chan Lee

We establish a priori regularity estimates for viscosity solutions of degenerate fully nonlinear elliptic equations with integrable right-hand sides. When the nonhomogeneous term b…

math.AP2026

Calderon-Zygmund estimates for generalized double phase equations with matrix weights

Sun-Sig Byun, Hongsoo Kim

We prove Calderon-Zygmund estimates for generalized double phase equations with Orlicz growth and variable matrix weights. The operator combines a non-uniformly elliptic double pha…

math.AP2026

C^{1,α} regularity for a class of singular/degenerate fully nonlinear elliptic equations with oblique boundary conditions

Sun-Sig Byun, Hongsoo Kim, Seunghyun Kim

In this paper, we establish global regularity for viscosity solutions to a class of singular and degenerate fully nonlinear elliptic equations subject to oblique boundar…

math.AP2026

Harnack inequality for anisotropic fully nonlinear equations with nonstandard growth

Sun-Sig Byun, Hongsoo Kim

We establish Harnack inequalities for viscosity solutions of a class of degenerate fully nonlinear anisotropic elliptic equations with nonstandard growth, including anisotropic-$(p…

math.AP2025

ABP estimate and Harnack inequality for a class of degenerate fully nonlinear pseudo--Laplacian equations

Sun-Sig Byun, Hongsoo Kim

We prove Aleksandrov-Bakelman-Pucci estimates and Harnack inequalities for viscosity solutions of a class of degenerate fully nonlinear pseudo--Laplacian equations in nondiverge…

math.AP2025

Lipschitz regularity for anisotropic fully nonlinear equations with nonstandard growth

Sun-Sig Byun, Hongsoo Kim

We establish interior Lipschitz regularity for solutions to anisotropic fully nonlinear equations with nonstandard growth, without imposing any restriction on the gap between the h…

math.AP2025

Lipschitz regularity for fully nonlinear elliptic equations with -growth

Sun-Sig Byun, Hongsoo Kim

We prove the interior and global Lipschitz regularity results for a solution of fully nonlinear equations with -growth. We prove that for a small gap , a solution is lo…

math.AP2024

Interior type estimates for degenerate fully nonlinear elliptic equations with data

Sun-Sig Byun, Hongsoo Kim, Jehan Oh

We establish interior type estimates for a class of degenerate fully nonlinear elliptic equations with data. The main idea of our approach is to slide con…

math.AP2024

regularity for degenerate fully nonlinear elliptic equations with oblique boundary conditions on domains

Sun-Sig Byun, Hongsoo Kim, Jehan Oh

We provide a sharp estimate up to the boundary for a viscosity solution of a degenerate fully nonlinear elliptic equation with the oblique boundary condition on a d…