Resonances in a spring-pendulum: algorithms for equivariant singularity theory
- 1 November 1998
- journal article
- Published by IOP Publishing in Nonlinearity
- Vol. 11 (6) , 1569-1605
- https://doi.org/10.1088/0951-7715/11/6/009
Abstract
A spring-pendulum in resonance is a time-independent Hamiltonian model system for formal reduction to one degree of freedom, where some symmetry (reversibility) is maintained. The reduction is handled by equivariant singularity theory with a distinguished parameter, yielding an integrable approximation of the Poincaré map. This makes a concise description of certain bifurcations possible. The computation of reparametrizations from normal form to the actual system is performed by Gröbner basis techniques.Keywords
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