Exponential polar factorization of the fundamental matrix of linear differential systems
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Títol
Exponential polar factorization of the fundamental matrix of linear differential systemsData de publicació
2015-07-01xmlui.dri2xhtml.METS-1.0.item-edition
Pre-printISSN
0377-0427Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
http://www.sciencedirect.com/science/article/pii/S0377042714001344Versió
info:eu-repo/semantics/sumittedVersionParaules clau / Matèries
Resum
We propose a new constructive procedure to factorize the fundamental real matrix of a linear system of differential equations as the product of the exponentials of a symmetric and a skew-symmetric matrix. Both matrices ... [+]
We propose a new constructive procedure to factorize the fundamental real matrix of a linear system of differential equations as the product of the exponentials of a symmetric and a skew-symmetric matrix. Both matrices are explicitly constructed as series whose terms are computed recursively. The procedure is shown to converge for sufficiently small times. In this way, explicit exponential representations for the factors in the analytic polar decomposition are found. An additional advantage of the algorithm proposed here is that, if the exact solution evolves in a certain Lie group, then it provides approximations that also belong to the same Lie group, thus preserving important qualitative properties. [-]
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Journal of Computational and Applied Mathematics, 2014, 268: 168-178Drets d'accés
Copyright © 2014 Elsevier B.V. All rights reserved.
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