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Hodge polynomials of the moduli spaces of triples of rank (2,2).

By Vicente Muñoz, Daniel Ortega and M. Jesús Vázquez Gallo

Abstract

Let X be a smooth projective curve of genus g ≥ 2 over the complex numbers. A holomorphic triple (E1, E2, φ) on X consists of two holomorphic vector bundles E1 and E2 over X\ud and a holomorphic map φ: E2 → E1. There is a concept of stability for triples which depends on a real parameter σ. In this paper, we determine the Hodge polynomials of the moduli spaces of σ-stable triples with rk(E1) = rk(E2) = 2, using the theory of mixed Hodge structures (in the cases\ud that they are smooth and compact). This gives in particular the Poincar´e polynomials of these moduli spaces. As a byproduct, we also give the Hodge polynomial of the moduli space of even degree rank 2 stable vector bundles

Topics: Geometria algebraica
Publisher: Oxford University Press
Year: 2009
DOI identifier: 10.1093/qmath
OAI identifier: oai:www.ucm.es:20887
Provided by: EPrints Complutense

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