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JOURNALS // Izvestiya Instituta Matematiki i Informatiki Udmurtskogo Gosudarstvennogo Universiteta // Archive

Izv. IMI UdGU, 2022 Volume 59, Pages 15–24 (Mi iimi425)

MATHEMATICS

Existence of weak solutions for a $p(x)$-Laplacian equation via topological degree

M. Ait Hammou, E. H. Rami

Laboratory LAMA, Department of Mathematics, Sidi Mohamed Ben Abdellah University, Fez, Morocco

Abstract: We consider the $p(x)$-Laplacian equation with a Dirichlet boundary value condition
\begin{equation*} \begin{cases} -\Delta_{p(x)}(u)+|u|^{p(x)-2}u= g(x,u,\nabla u), &x\in\Omega,\\ u=0, &x\in\partial\Omega, \end{cases} \end{equation*}
Using the topological degree constructed by Berkovits, we prove, under appropriate assumptions, the existence of weak solutions for this equation.

Keywords: weak solution, Dirichlet boundary condition, variable exponent Sobolev space, topological degree, $p(x)$-Laplacian.

UDC: 517.95

MSC: 35D30, 35J67, 46E35, 47H11

Received: 28.12.2021
Accepted: 26.04.2022

Language: English

DOI: 10.35634/2226-3594-2022-59-02



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© Steklov Math. Inst. of RAS, 2024