Generic bifurcations of the twist coefficient

Richard Moeckel

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


We study the behavior of the twist coefficient near an elliptic fixed point for a one-parameter family of area-preserving diffeomorphisms. By looking at the singularities near resonance we can explain the sign changes which are typically found in such a family.

Original languageEnglish (US)
Pages (from-to)185-195
Number of pages11
JournalErgodic Theory and Dynamical Systems
Issue number1
StatePublished - Mar 1990


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