Moduli spaces of vector bundles over a real curve: Z/2-Betti numbers

Abstract

Moduli spaces of real bundles over a real curve arise naturally as Lagrangian submanifolds of the moduli space of semi-stable bundles over a complex curve. In this paper, we adapt the methods of Atiyah-Bott's "Yang-Mills over a Riemann Surface" to compute Z/2-Betti numbers of these spaces, proving formulas recently obtained by Liu and Schaffhauser.

33 pages. Implemented referee suggestions and simplified exposition in the introduction. Comments welcome

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