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Stability of Equilibrium Solutions in Planar Hamiltonian Difference Systems

Published online by Cambridge University Press:  20 November 2018

Cristian Carcamo  and
Claudio Vidal
Cristian Carcamo
Affiliation:
Depto. de Mat., Fac. de Ciencias, Universidad del Bíio-Bío, Casilla 5-C, Concepción, VIII-región, Chile. e-mail: ccarcamo@ubiobio.cl, clvidal@ubiobio.cl
Claudio Vidal
Affiliation:
Depto. de Mat., Fac. de Ciencias, Universidad del Bíio-Bío, Casilla 5-C, Concepción, VIII-región, Chile. e-mail: ccarcamo@ubiobio.cl, clvidal@ubiobio.cl
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Abstract

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In this paper, we study the stability in the Lyapunov sense of the equilibrium solutions of discrete or difference Hamiltonian systems in the plane. First, we perform a detailed study of linear Hamiltonian systems as a function of the parameters. In particular we analyze the regular and the degenerate cases. Next, we give a detailed study of the normal form associated with the linear Hamiltonian system. At the same time we obtain the conditions under which we can get stability (in linear approximation) of the equilibrium solution, classifying all the possible phase diagrams as a function of the parameters. After that, we study the stability of the equilibrium solutions of the first order difference system in the plane associated with mechanical Hamiltonian systems and Hamiltonian systems defined by cubic polynomials. Finally, we point out important differences with the continuous case.

Keywords

34D2034E10difference equationsHamiltonian systemsstability in the Lyapunov sense
Type
Research Article
Information
Canadian Journal of Mathematics , Volume 67 , Issue 6 , 01 December 2015 , pp. 1270 - 1289
Copyright
Copyright © Canadian Mathematical Society 2015

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