Deift, Percy; Lund, Fernando; Trubowitz, Eugene Nonlinear wave equations and constrained harmonic motion. (English) Zbl 0435.35071 Proc. Natl. Acad. Sci. USA 77, 716-719 (1980). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 Document MSC: 35Q99 Partial differential equations of mathematical physics and other areas of application 35L99 Hyperbolic equations and hyperbolic systems Keywords:nonlinear wave equations; free oscillators; Korteweg-de Vries equation; nonlinear Schrödinger equation; sine-Gordon equation; dynamical system; constraint; inverse spectral theory PDFBibTeX XMLCite \textit{P. Deift} et al., Proc. Natl. Acad. Sci. USA 77, 716--719 (1980; Zbl 0435.35071) Full Text: DOI