"Scalar curvature and holomorphy potentials" by Gideon Maschler
 

Mathematics

Scalar curvature and holomorphy potentials

Document Type

Article

Abstract

A holomorphy potential is a complex valued function whose complex gradient, with respect to some Kähler metric, is a holomorphic vector field. Given k holomorphic vector fields on a compact complex manifold, form, for a given Kähler metric, a product of the following type: a function of the scalar curvature multiplied by functions of the holomorphy potentials of each of the vector fields. It is shown that the stipulation that such a product be itself a holomorphy potential for yet another vector field singles out critical metrics for a particular functional. This may be regarded as a generalization of the extremal metric variation of Calabi, where k=0 and the functional is the square of the L 2-norm of the scalar curvature. The existence question for such metrics is examined in a number of special cases. Examples are constructed in the case of certain multifactored product manifolds. For the SKRmetrics investigated by Derdzinski and Maschler and residing in the complex projective space, it is shown that only one type of nontrivial criticality holds in dimension three and above. © 2012 Elsevier B.V.

Publication Title

Journal of Geometry and Physics

Publication Date

7-2012

Volume

62

Issue

7

First Page

1665

Last Page

1676

ISSN

0393-0440

DOI

10.1016/j.geomphys.2012.03.001

Keywords

Extremal kähler metric, holomorphy potential, killing potential

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