Volume 297, Issue 5 pp. 1818-1830
ORIGINAL ARTICLE

Global integrability for solutions to quasilinear elliptic systems with degenerate coercivity

Ya Li

Ya Li

College of Mathematics and Information Science, Hebei University, Baoding, China

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Gaoyang Liu

Gaoyang Liu

College of Mathematics and Information Science, Hebei University, Baoding, China

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Hongya Gao

Corresponding Author

Hongya Gao

College of Mathematics and Information Science, Hebei University, Baoding, China

Correspondence

Hongya Gao, College of Mathematics and Information Science, Hebei University, Baoding, 071002, China.

Email: [email protected]

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First published: 11 January 2024

Abstract

This paper deals with global integrability for solutions to quasilinear elliptic systems involving N $N$ equations of the form

i = 1 n D i β = 1 N j = 1 n a i , j α , β ( x , u ( x ) ) D j u β ( x ) = f α ( x ) , in Ω , u ( x ) = 0 , on Ω , $$\begin{equation*} {\begin{cases} \displaystyle -\sum _{i=1}^n D_i {\left(\sum _{\beta =1}^N \sum _{j=1}^n a^{\alpha, \beta } _{i,j} (x,u(x)) D_j u^\beta (x) \right)} =f^\alpha (x), & \mbox{ in } \Omega, \\[10pt] \displaystyle u(x)=0, &\displaystyle \mbox{ on } \partial \Omega, \end{cases}} \end{equation*}$$
where Ω $\Omega$ is an open bounded subset of R n $\mathbb {R}^n$ , n > 2 $n>2$ , u = ( u 1 , u 2 , , u N ) : Ω R n R N $u=(u^1,u^2,\ldots,u^N):\Omega \subset \mathbb {R}^n \rightarrow \mathbb {R}^N$ , N 2 $N\ge 2$ . Under degenerate coercivity condition of the diagonal coefficients and proportional condition of the off-diagonal coefficients, we obtain some global integrability results.

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