The Picard group of the moduli space of r-Spin Riemann surfaces

Details The Picard group of the moduli space of r-Spin Riemann surfaces The Picard group of the moduli space of r-Spin Riemann surfaces

2011-02-03

arxiv.org/abs/1102.0715v2

Mathematics

Algebraic Topology

v2: Fixed some formulae and improved Theorem 1.15

Scientific paper

We have recently proved a homological stability theorem for moduli spaces of r-Spin Riemann surfaces, which in particular implies a Madsen--Weiss theorem for these moduli spaces. This allows us to effectively study their stable cohomology, and to compute their stable rational cohomology and their integral Picard groups. Using these methods we give a complete description of their integral Picard groups for genus at least 9 in terms of geometrically defined generators, and determine the relations between them.

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