2018-06-25T17:27:06Z
http://digital.csic.es/dspace-oai/request
oai:digital.csic.es:10261/2523
2016-02-16T01:56:14Z
com_10261_27
com_10261_4
col_10261_280
Betti numbers of the moduli space of rank 3 parabolic Higgs bundles
García Prada, Oscar
Gothen, Peter B.
Muñoz, Vicente
Parabolic bundles
Higgs bundles
Moduli spaces
[Present] Version nr. 3 (2005/06/01) is an extended version of Nr. 1 (2004/11/10), to which a section with the fixed determinant case was added. To appear in Memoirs of the AMS.
Parabolic Higgs bundles on a Riemann surface are of interest for many reasons, one of them being their importance in the study of representations of the fundamental group of the punctured surface in the complex general linear group. In this paper we calculate the Betti numbers of the moduli space of rank 3 parabolic Higgs bundles with fixed and non-fixed determinant, using Morse theory. A key point
is that certain critical submanifolds of the Morse function can be identified with moduli spaces of parabolic triples. These moduli spaces come in families depending on a real parameter and we carry out a careful analysis of them by studying their variation with this parameter. Thus we obtain in particular information about the topology of the moduli spaces of parabolic triples for the value of the parameter relevant to the study of parabolic Higgs bundles. The remaining critical submanifolds are also described: one of them is the moduli space of parabolic bundles, while the remaining ones have
a description in terms of symmetric products of the Riemann surface. As another
consequence of our Morse theoretic analysis, we obtain a proof of the parabolic version of a theorem of Laumon, which states that the nilpotent cone (the preimage of zero under the Hitchin map) is a Lagrangian subvariety of the moduli space of parabolic Higgs bundles.
2007-12-04T15:52:49Z
2007-12-04T15:52:49Z
2005-06-01
Pre-print
arXiv:math/0411242v3
http://hdl.handle.net/10261/2523
eng
Preprint
openAccess