A new construction of homogeneous quaternionic manifolds and related geometric structures

Details A new construction of homogeneous quaternionic manifolds and related geometric structures A new construction of homogeneous quaternionic manifolds and related geometric structures

1999-08-13

arxiv.org/abs/math/9908058v1

Mathematics

Differential Geometry

to appear in the Memoirs of the AMS, 81 pages, Latex source file

Scientific paper

Let V be the pseudo-Euclidean vector space of signature (p,q), p>2 and W a module over the even Clifford algebra Cl^0 (V). A homogeneous quaternionic manifold (M,Q) is constructed for any spin(V)-equivariant linear map \Pi : \wedge^2 W \to V. If the skew symmetric vector valued bilinear form \Pi is nondegenerate then (M,Q) is endowed with a canonical pseudo-Riemannian metric g such that (M,Q,g) is a homogeneous quaternionic pseudo-K\"ahler manifold. The construction is shown to have a natural mirror in the category of supermanifolds. In fact, for any spin(V)-equivariant linear map \Pi : Sym^2 W \to V a homogeneous quaternionic supermanifold (M,Q) is constructed and, moreover, a homogeneous quaternionic pseudo-K\"ahler supermanifold (M,Q,g) if the symmetric vector valued bilinear form \Pi is nondegenerate.

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