Locally conformal Kaehler reduction

Details Locally conformal Kaehler reduction Locally conformal Kaehler reduction

2002-08-27

arxiv.org/abs/math/0208208v1

J. Reine Angew. Math. (Crelle Journal) vol. 581 (2005) 1-21

Mathematics

Differential Geometry

22 pages

Scientific paper

We define reduction of locally conformal Kaehler manifolds, considered as conformal Hermitian manifolds, and we show its equivalence with an unpublished construction given by Biquard and Gauduchon. We show the compatibility between this reduction and Kaehler reduction of the universal cover. By a recent result of Kamishima and the second author, in the Vaisman case (that is, when a metric in the conformal class has parallel Lee form) if the manifold is compact its universal cover comes equipped with the structure of Kaehler cone over a Sasaki compact manifold. We show the compatibility between our reduction and Sasaki reduction, hence describing a subgroup of automorphisms whose action causes reduction to bear a Vaisman structure. Then we apply this theory to construct a wide class of Vaisman manifolds.

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