Monotonicity and Symmetry of Positive Solutions to Logarithmic LaplacianEquations and Systems with Gradient Terms

Citation:

Xianghui XU ·,Tingzhi CHENG.Monotonicity and Symmetry of Positive Solutions to Logarithmic LaplacianEquations and Systems with Gradient Terms[J].Chinese Annals of Mathematics B,2026,(5):823~832
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Authors:

Xianghui XU ·; Tingzhi CHENG

Foundation:

the National Natural Science Foundation of China (Nos. 12501263, 12401259), the Shandong Provincial Natural Science Foundation (No. ZR2021QA070) and the Shanghai Frontier Research Center of Modern Analysis.
Abstract: This paper is concerned with logarithmic Laplacian equations and systems with gradient terms in bounded convex domains. Under some assumptions on the nonlinearities, the authors prove the strict monotonicity and symmetry of positive solutions. In particular, the authors establish one new estimate of the logarithmic Laplacian operator that plays an important role in applying the direct method of moving planes. This paper seems to be the first one to deal with the monotonicity and symmetry of positive solutions to logarithmic Laplacian equations and systems with gradient terms.

Keywords:

Logarithmic Laplacian  Monotonicity  Positive solution  Convex domain

Classification:

35J67, 35R11
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