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Horáček, Oldřich
Über die Existenz einer periodischen Lösung der nichtlinearen Wellengleichung in $E_2$ (Vorläufige Mitteilung). (German) [On the existence of a periodic solution of the nonlinear wave equation in $E_2$ (Preliminary communication)]. Commentationes Mathematicae Universitatis Carolinae, vol. 10 (1969), issue 3, pp. 421-424
MSC: 35-12, 35Jxx | MR 0259324 | Zbl 0189.15202
References:
[1] J. SATHER: The initial boundary value problem for a non-linear hyperbolic equation in relativistic quantum mechanics. Journal of Mathematics and Mechanics, Vol. 16, 1 (1966), 27-50. MR 0196301 | Zbl 0141.28803
[2] J. L. LIONS: Équations différentielles opérationnelles et problèmes aux limites. Springer - Verlag, Berlin, 1961. MR 0153974 | Zbl 0098.31101
[3] G. PROUSE: Soluzioni periodiche dell equazione delle ondo non omogenea con termine dissipativo quadratico. Richerche di Matematica, XIII, 2 (1964), 261-280. MR 0194753
[4] A. FRIEDMAN: Partial differential equation of parabolic type. Englewood Cliffs, Prentice-Hall, 1964. MR 0181836
[5] E. HILLE R. S. PHILLIPS: Functional analysis and semi-groups. American Mathematical Society, 1957. MR 0089373
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