Electron. J. Differential Equations, Vol. 2025 (2025), No. 102, pp. 1-18.

L^q-regularity estimates for double obstacle problems with quasilinear operators and Schrodinger-type lower order terms

Mikyoung Lee, Jihoon Ok

Abstract:
We derive interior and boundary \(L^q\)-regularity estimates for double obstacle problems involving quasilinear operators of \(p\)-Laplacian type and lower-order terms with nonnegative potential functions satisfying a reverse Holder type condition. We prove that the \(L^q\) norms of the gradient of a solution to the obstacle problem, as well as the lower-order term, can be estimated by the \(L^q\) norms of the data and the gradients of the obstacles. Moreover, the relevant constants in the \(L^q\) estimates depend only on the constant in the reverse Holder type condition for the potential and are independent of the potential.

Submitted July 2, 2025. Published October 30, 2025.
Math Subject Classifications: 35J87, 35J92, 35J10, 35B65.
Key Words: Obstacle problem; Schrodinger operator; \(L^q\)-estimates; nonnegative potential; p-Laplacian.
DOI: 10.58997/ejde.2025.102

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Mikyoung Lee
Department of Mathematics and Institute of Mathematical Science
Pusan National University, Busan 46241, Korea
email: mikyounglee@pusan.ac.kr
Jihoon Ok
Department of Mathematics
Institute for Mathematical and Data Science
Sogang University, Seoul 04107, Korea
email: jihoonok@sogang.ac.kr

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