
A nonlinear wave equation of the form: \[ u_{tt} - u_{ss} = g(t,s,u) + g_1(u) u_t \] on an infinite strip \(\mathbb{R} \times [0,a]\) is studied. Suffient conditions are given in terms of the structural properties of the functions \(g\) and \(g_1\) for the problem to possess at least one time-periodic solution provided \(g\) is periodic in \(t\). Uniqueness of these solutions is also studied.
at least one time-periodic solution, Applied Mathematics, uniqueness, Analysis, Periodic solutions to PDEs, Second-order nonlinear hyperbolic equations
at least one time-periodic solution, Applied Mathematics, uniqueness, Analysis, Periodic solutions to PDEs, Second-order nonlinear hyperbolic equations
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