Integrability of the twistor space for a hypercomplex manifold

Details Integrability of the twistor space for a hypercomplex manifold Integrability of the twistor space for a hypercomplex manifold

1996-12-18

arxiv.org/abs/alg-geom/9612016v1

Mathematics

Algebraic Geometry

9 pages, Latex2e

Scientific paper

A hypercomplex manifold is by definition a smooth manifold equipped with two anticommuting integrable almost complex structures. For example, every hyperkaehler manifold is canonically hypercomplex (the converse is not true). For every hypercomplex manifold M, the two almost complex structures define a smooth action of the algebra of quaternions on the tangent bundle to M. This allows to associate to every hypercomplex manifold M of dimension 4n a certain almost complex manifold X of dimension 4n+2, called the twistor space of M. When M is hyperkaehler, X is well-known to be integrable. We show that for an arbitrary hypercomplex manifold its twistor space is also integrable.

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