Abstract
In this paper, we establish a regularity theory in the Orlicz space for the Poisson equation −Δu = f, where f lies in the Orlicz space \(L^{\phi}\) with \(\phi\) satisfying Δ2 and ∇2 conditions. The proof is based on standard W 2, p estimates and Hardy–Littlewood maximal functions.
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Jia, H., Li, D. & Wang, L. Regularity in Orlicz spaces for the Poisson equation. manuscripta math. 122, 265–275 (2007). https://doi.org/10.1007/s00229-006-0066-y
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DOI: https://doi.org/10.1007/s00229-006-0066-y