A Universal Family of Deformations for the Uniformising Higgs bundle

Details A Universal Family of Deformations for the Uniformising Higgs bundle A Universal Family of Deformations for the Uniformising Higgs bundle

2011-11-28

arxiv.org/abs/1111.6457v1

Mathematics

Algebraic Geometry

Preliminary version. Comments welcome!

Scientific paper

Fix a simple complex Lie group G and a principal sl(2,C) subalgebra of Lie(G). Then the moduli space of semi-stable, topologically trivial G-Higgs bundles on a hyperbolic, spin Riemann surface acquires a marked point. This is the unique C*-fixed point on the Hitchin section. We describe a universal analytic family of deformations which provides holomorphic Darboux coordinates in a neighbourhood of the section. This is a special case of a more general deformation-theoretic construction in the spirit of Kuranishi theory. As a toy example of the latter we consider the tautological family of centralisers over the Kostant slice.

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