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A torus bifurcation theorem with symmetry (1989)

Vangils, S. A. ; Golubitsky, M.

In: CASI

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Publication Date: 2019-07-12

Description: Hopf bifurcation in the presence of symmetry, in situations where the normal form equations decouple into phase/amplitude equations is described. A theorem showing that in general such degeneracies are expected to lead to secondary torus bifurcations is proved. By applying this theorem to the case of degenerate Hopf bifurcation with triangular symmetry it is proved that in codimension two there exist regions of parameter space where two branches of asymptotically stable two-tori coexist but where no stable periodic solutions are present. Although a theory was not derived for degenerate Hopf bifurcations in the presence of symmetry, examples are presented that would have to be accounted for by any such general theory.

Keywords: NUMERICAL ANALYSIS

Type: NASA-CR-185907 , NAS 1.26:185907 , MEMO-760 , (ISSN 0169-2690)

Format: application/pdf

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