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• W2951864929 abstract "We study the moduli space M(G,A) of flat G-bundles on an Abelian surface A, where G is a compact, simple, simply connected, connected Lie group. Equivalently, M(G,A) is the (coarse) moduli space of s-equivalence classes of holomorphic semi-stable G_C-bundles with trivial Chern classes where G_C is the complexified group. M(G,A) has the structure of a hyperkahler orbifold. We show that when G is Sp(n) or SU(n), M(G,A) has a natural hyperkahler desingularization which we exhibit as a moduli space of G_C-bundles with an altered stability condition. In this way, we obtain the two known families of hyperkahler manifolds, the Hilbert scheme of points on a K3 surface and the generalized Kummer varieties. We show that for G not Sp(n) or SU(n), the moduli space M(G,A) does not admit a hyperkahler resolution, in fact, it does not have a crepant resolution. Inspired by the physicists Vafa and Zaslow, Batyrev and Dais define ``stringy Hodge numbers'' for certain orbifolds. These numbers are conjectured to agree with the Hodge numbers of a crepant resolution (when it exists). We compute the stringy Hodge numbers of M(SU(n),A) and M(Sp(n),A) and verify the conjecture in these cases." @default.
• W2951864929 created "2019-06-27" @default.
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• W2951864929 date "2000-04-25" @default.
• W2951864929 modified "2023-09-27" @default.
• W2951864929 title "G-bundles on Abelian surfaces, hyperkahler manifolds, and stringy Hodge numbers" @default.
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• W2951864929 hasPublicationYear "2000" @default.
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