scientific article; zbMATH DE number 4126142
zbMath0687.47046MaRDI QIDQ4205976
Publication date: 1990
Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Brouwer degreehyperbolic systemsoperator equationsGalerkin type methodasymptotically close at infinity to a selfadjoint mapequations in one and more space variablesexistence of time-periodic solutions of the variational boundaryexistence of time-periodic solutions of the variational boundary problems for the semilinear (systems of) wave and telegraph equations in one and more space variablesproblems for the semilinear (systems of) wave and telegraphpseudo-A- properreasonance and nonreasonance cases
Initial-boundary value problems for second-order hyperbolic equations (35L20) Equations involving nonlinear operators (general) (47J05) Numerical solutions to equations with nonlinear operators (65J15)
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