Toric anti-self-dual 4-manifolds via complex geometry

Details Toric anti-self-dual 4-manifolds via complex geometry Toric anti-self-dual 4-manifolds via complex geometry

2006-02-20

arxiv.org/abs/math/0602423v3

Mathematische Annalen, 2006, 336(2), 281--309

Mathematics

Differential Geometry

25 pages, 2 figures, v2 corrected some misprints, v3 corrected more misprints, published version (minus one typo)

Scientific paper

Using the twistor correspondence, this article gives a one-to-one correspondence between germs of toric anti-self-dual conformal classes and certain holomorphic data determined by the induced action on twistor space. Recovering the metric from the holomorphic data leads to the classical problem of prescribing the Cech coboundary of 0-cochains on an elliptic curve covered by two annuli. The classes admitting Kahler representatives are described; each such class contains a circle of Kahler metrics. This gives new local examples of scalar-flat Kahler surfaces and generalises work of Joyce who considered the case where the distribution orthogonal to the torus action is integrable.

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