Mathematics – Dynamical Systems
Scientific paper
2011-06-06
Mathematics
Dynamical Systems
56pp
Scientific paper
We define boundedness properties on the contractible fixed points set of the time-one map of an identity isotopy on an oriented closed surface with genus $g\geq1$. In symplectic geometry, a classical object is the notion of action function, defined on the set of contractible fixed points of the time-one map of a Hamiltonian isotopy. We give a dynamical interpretation of this function that permits us to generalize it in the case of a homeomorphism isotopic to identity that preserves a Borel finite measure of rotation vector zero, provided that a boundedness condition is satisfied. We give some properties of the generalized action.
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