On almost Poisson commutativity in dimension two

Details On almost Poisson commutativity in dimension two On almost Poisson commutativity in dimension two

2010-04-06

arxiv.org/abs/1004.0870v1

Mathematics

Symplectic Geometry

8 pages

Scientific paper

Consider the following question: given two functions on a symplectic manifold whose Poisson bracket is small, is it possible to approximate them in the $C^0$ norm by commuting functions? We give a positive answer in dimension two, as a particular case of a more general statement which applies to functions on a manifold with a volume form. This result is based on a lemma in the spirit of geometric measure theory. We give some immediate applications to function theory and the theory of quasi-states on surfaces with area forms.

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