| Abstract: |
| In this talk, we consider the time periodic solutions of nonlinear wave equation with $x$-dependent coefficients. Such a model arises from the forced vibrations of an inhomogeneous string and the propagation of seismic waves in nonisotropic media. We shall talk about some recent results on the existence and multiplicity of time periodic solutions for the nonlinear wave equation with $x$-dependent coefficients. |
|