A forgotten theorem on Z^k × R^m-action germs and related questions
(Preliminary version of the article appeared in Regular and Chaotic Dynamics 18, No. 6 (2013) dedicated to Alain Chenciner, 742-775)
Résumé
Two weakly hyperbolic smooth Z^k × R^m-action germs are smoothly conjugate if and only if they are formally conjugate, and such.
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