Decay and asymptotics for □u = F(u)

Bateman, 1953, Vol. 2 Brodsky, 1966, The existence of wave operators for non-linear equations, Pacific J. Math., 19, 1, 10.2140/pjm.1966.19.1 Browder, 1963, Scattering for non-linear wave equations, Pacific J. Math., 13, 23, 10.2140/pjm.1963.13.23 Dunford, 1963, Vol. 2 Gagliardo, 1958, Propriétà di algune classi di funzioni in più variàbili, Ricerche Mat., 7, 102 Jörgens, 1961, Das Anfangswertproblem im Grossen für eine Klasse nichtlinearer Wellengleichungen, Math. Z., 77, 295, 10.1007/BF01180181 Lax, 1967 Morawetz, 1962, The limiting amplitude principle, Commun. Pure Appl. Math., 15, 349, 10.1002/cpa.3160150303 Nelson, 1966 Segal, 1963, Non-linear semigroups, Ann. Math., 78, 339, 10.2307/1970347 Segal, 1966, Quantization and dispersion for non-linear relativistic equations, 79 Segal, 1966, Non-linear relativistic partial differential equations Segal, I. E., Dispersion for non-linear relativistic equations II, (to be published). Strauss, 1963, Scattering for hyperbolic equations, Trans. Am. Math. Soc., 108, 13, 10.1090/S0002-9947-1963-0192185-1 Strauss, 1963, La décroissance asymptotique des solutions des équations d'onde non linéaires, Compt. Rend. Acad. Sci. Paris, 256, 2749 Strauss, 1963, Les opérateurs d'onde pour des équations d'onde non linéaires, Compt. Rend. Acad. Sci. Paris, 256, 5045 Strauss, 1966, On continuity of functions with values in various Banach spaces, Pacific J. Math., 19, 543, 10.2140/pjm.1966.19.543 Zachmanoglou, 1963, The decay of solutions, Arch. Ratl. Mech. Anal., 14, 312, 10.1007/BF00250710 Morawetz, 1966, Energy identities for the wave equation Morawetz, C. S., Time decay for the non-linear Klein-Gordon equation. Proc. Royal Soc. (London) (to be published).