Poincare Analyticity and the Complete Variational Equations

Details Poincare Analyticity and the Complete Variational Equations Poincare Analyticity and the Complete Variational Equations

2011-02-16

arxiv.org/abs/1102.3394v1

Physics

Mathematical Physics

86 pages including 22 figures

Scientific paper

According to a theorem of Poincare, the solutions to differential equations are analytic functions of (and therefore have Taylor expansions in) the initial conditions and various parameters providing the right sides of the differential equations are analytic in the variables, the time, and the parameters. We describe how these Taylor expansions may be obtained, to any desired order, by integration of what we call the complete variational equations. As illustrated in a Duffing equation stroboscopic map example, these Taylor expansions, truncated at an appropriate order thereby providing polynomial approximations, can well reproduce the behavior (including infinite period doubling cascades and strange attractors) of the solutions of the underlying differential equations.

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