1993/12/01 by Walter Craig, C. Eugene Wayne · 26 citations
Physics and Astronomy · Mathematics · Engineering · #Quantum chaos and dynamical systems #Numerical methods for differential equations #Stability and Controllability of Differential Equations
paper · doi:10.1002/cpa.3160461102
Abstract We prove the existence of periodic solutions of the nonlinear wave equation satisfying either Dirichlet or periodic boundary conditions on the interval [ O , π]. The coefficients of the eigenfunction expansion of this equation satisfy a nonlinear functional equation. Using a version of Newton's method, we show that this equation has solutions provided the nonlinearity g ( x, u ) satisfies certain generic conditions of nonresonance and genuine nonlinearity. © 1993 John Wiley & Sons, Inc.