Mathematics – Differential Geometry
Scientific paper
2002-09-10
Quart.J.Math.Oxford Ser.54:281-308,2003
Mathematics
Differential Geometry
37 pages, LateX
Scientific paper
10.1093/qjmath/54.3.281
A geometrical structure on even-dimensional manifolds is defined which generalizes the notion of a Calabi-Yau manifold and also a symplectic manifold. Such structures are of either odd or even type and can be transformed by the action of both diffeomorphisms and closed 2-forms. In the special case of six dimensions we characterize them as critical points of a natural variational problem on closed forms, and prove that a local moduli space is provided by an open set in either the odd or even cohomology.
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