Closed forms and multi-moment maps

Details Closed forms and multi-moment maps Closed forms and multi-moment maps

2011-10-29

arxiv.org/abs/1110.6541v1

Mathematics

Differential Geometry

36 pages

Scientific paper

We extend the notion of multi-moment map to geometries defined by closed forms of arbitrary degree. We give fundamental existence and uniqueness results and discuss a number of essential examples, including geometries related to special holonomy. For forms of degree four, multi-moment maps are guaranteed to exist and are unique when the symmetry group is (3,4)-trivial, meaning that the group is connected and the third and fourth Lie algebra Betti numbers vanish. We give a structural description of some classes of (3,4)-trivial algebras and provide a number of examples.

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