Acta mathematica scientia,Series A ›› 2025, Vol. 45 ›› Issue (2): 408-417.

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Research on the Regularity of a Class of Biharmonic Map-Type Partial Differential Equation Systems

Anqi Liu1(),Ting Yu1,*(),Changlin Xiang2()   

  1. 1College of Mathematics and Physics, China Three Gorges University, Hubei Yichang 443002
    22Three Gorges Mathematical Research Center, China Three Gorges University, Hubei Yichang 443002
  • Received:2024-07-22 Revised:2024-12-16 Online:2025-04-26 Published:2025-04-09
  • Contact: Ting Yu E-mail:anqi.liu@ctgu.edu.cn;yuting@ctgu.edu.cn;changlin.xiang@ctgu.edu.cn
  • Supported by:
    NSFC(12271296);SFC of Hubei province(2024AFA061)

Abstract:

Biharmonic mappings are an important class of geometric mappings, but the partial differential equations that are satisfied are very complex, making their regularity study difficult. In order to study this class of problems, in this note we consider a class of biharmonic map-type fourth order elliptic partial differential equation system

Δ2u=Q1(x,u,u,2u)+divQ2(x,u,u,2u)in B1,

where B1={xRn:|x|<1} with n4, and Q1,Q2 satisfy critical growth conditions with respect to u and 2u. Then, under suitable smallness assumption, this note proves that the solutions of this system of equations all have Hölder regularity, thus generalising related results in the literature. This result helps to deepen the understanding of the structure of biharmonic mappings and the research on the regularity theory.

Key words: biharmonic mappings, elliptic systems with critical nonlinearity, H?lder regularity, reverse Poincaré inequality, decay estimate

CLC Number: 

  • O175.25
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