Scalar-flat Kahler metrics on non-compact symplectic toric 4-manifolds
Abstract
In a recent paper Donaldson explains how to use an older construction of Joyce to obtain four dimensional local models for scalar-flat Kahler metrics with a 2-torus symmetry. Using this idea, he recovers and generalizes the Taub-NUT metric by including it in a new family of complete scalar-flat toric Kahler metrics. In this paper we generalize Donaldson's method and construct complete scalar-flat toric Kahler metrics on any symplectic toric 4-manifold with "strictly unbounded" moment polygon. These include the asymptotic locally Euclidean scalar-flat Kahler metrics previously constructed by Calderbank and Singer, as well as new examples of complete scalar-flat toric Kahler metrics which are asymptotic to Donaldson's generalized Taub-NUT metrics. Our construction is in symplectic action-angle coordinates and determines all these metrics via their symplectic potentials. When the first Chern class is zero we obtain a new description of known Ricci-flat Kahler metrics.
Keywords
Cite
@article{arxiv.0910.5466,
title = {Scalar-flat Kahler metrics on non-compact symplectic toric 4-manifolds},
author = {Miguel Abreu and Rosa Sena-Dias},
journal= {arXiv preprint arXiv:0910.5466},
year = {2011}
}
Comments
30 pages, 3 figures. Revised version: minor corrections, added two references. Version 3: minor changes, corrected sign mystake, updated references