caa a22 4500 465820131 CHVBK 20180323112133.0 cr unu---uuuuu 170327e19901201xx s 000 0 eng 10.1007/BF01765314 doi (NATIONALLICENCE)springer-10.1007/BF01765314 Periodic solutions of nonlinear differential equations with double resonance [Elektronische Daten] [C. Fabry, A. Fonda] Summary: We prove the existence of periodic solutions of a second order nonlinear ordinary differential equation whose nonlinearity is at resonance with two successive eigenvalues of the associated linear operator and satisfies some Landesman-Laser type conditions at both of them. Fondazione Annali di Matematica Pura ed Applicata, 1990 Fabry C. Institut de Mathématique, Université Catholique de Louvain, Chemin du Cyclotron 2, B-1348, Louvain-la-Neuve, Belgique aut Fonda A. Institut de Mathématique, Université Catholique de Louvain, Chemin du Cyclotron 2, B-1348, Louvain-la-Neuve, Belgique aut Annali di Matematica Pura ed Applicata Springer-Verlag 157/1(1990-12-01), 99-116 0373-3114 157:1<99 1990 157 10231 https://doi.org/10.1007/BF01765314 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01765314 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Fabry C. Institut de Mathématique, Université Catholique de Louvain, Chemin du Cyclotron 2, B-1348, Louvain-la-Neuve, Belgique aut NATIONALLICENCE 700 1- Fonda A. Institut de Mathématique, Université Catholique de Louvain, Chemin du Cyclotron 2, B-1348, Louvain-la-Neuve, Belgique aut NATIONALLICENCE 773 0- Annali di Matematica Pura ed Applicata Springer-Verlag 157/1(1990-12-01), 99-116 0373-3114 157:1<99 1990 157 10231 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer