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Hodge structure on the cohomology of the moduli space of Higgs bundles

Mridul Mehta

Published 2001-12-12, updated 2002-11-27Version 2

We study the moduli space of Higgs bundles on a compact Riemann surface. It was shown by Thaddeus and Hausel (in rank 2) and Markman (in general rank) that the rational cohomology ring of this space is generated by universal classes. In this paper, we use their results to compute the Hodge structure on the cohomology of this moduli space. We show that the natural Hodge structure on H^k is pure of weight k.

Comments: 7 pages. The only change is the addition of a reference to the proof of the generation theorem for general rank by E. Markman
Categories: math.AG
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