# Bulletin of theKorean Mathematical SocietyBKMS

ISSN(Print) 1015-8634 ISSN(Online) 2234-3016

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Bull. Korean Math. Soc.

Published online May 12, 2022

## Application of Rothe's method to a nonlinear wave equation on graphs

Yong Lin and Yuanyuan Xie

Tsinghua University, Tianjin University of Finance and Economics

### Abstract

We study a nonlinear wave equation on finite connected weighted graphs. Using Rothe's and energy methods, we prove the existence and uniqueness of solution under certain assumption. For linear wave equation on graphs, Lin and Xie \cite{Lin-Xie} obtained the existence and uniqueness of solution. The main novelty of this paper is that the wave equation we considered has the nonlinear damping term $|u_t|^{p-1}\cdot u_t$ ($p>1$).

Keywords: Rothe's method, nonlinear wave equation, graph

MSC numbers: 35L05, 35R02, 58J45