Guiding-like functions for periodic or bounded solutions of ordinary differential equations

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January 2002, 8(1): 39-54. doi: 10.3934/dcds.2002.8.39

Guiding-like functions for periodic or bounded solutions of ordinary differential equations

Jean Mawhin ^1, and James R. Ward Jr ^2,

1.	Institut Mathématique Pure et Appliquée, Université Catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium
2.	Department of Mathematics, University of Alabama at Birmingham, Birmingham, AL 35294, United States

Received January 2001 Revised May 2001 Published October 2001

Abstract
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We state and prove some extensions of the fundamental theorem of the method of guiding functions for periodic and for bounded solutions of ordinary differential systems. Those results unify and generalize previous results of Krasnosel'skii, Perov, Mawhin, Walter and Gossez.

Keywords: coincidence degree., Guiding functions, periodic solutions, bounded solutions.

Mathematics Subject Classification: 34C25, 34D4.

Citation: Jean Mawhin, James R. Ward Jr. Guiding-like functions for periodic or bounded solutions of ordinary differential equations. Discrete & Continuous Dynamical Systems - A, 2002, 8 (1) : 39-54. doi: 10.3934/dcds.2002.8.39

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