Department of Mathematics

Seminar in Cluster algebras

  •  Ezra Getzler, Northwestern University
  •  Generalizations of the theorem of Moore and Seiberg in 2 dimensional topological field theory
  •  12/06/2016
  •  1:00 PM - 1:50 PM
  •  C304 Wells Hall

The Teichmüller space of a compact Riemann surface has a natural bordification: that is, there is a real-analytic manifold with corners containing Teichmüller space as its top-dimensional stratum, such that the action of the mapping class-group extends to the boundary. This construction is due to Harvey. In this talk, I discuss generalizations of this construction in the presence of cusps and orbifold points: this leads to a generalization of the Moore-Seiberg theorem, which may be formulated as the statement that the 2-skeleton of this bordification is simply connected. We also give analogues for real Riemann surfaces, which allows us to extend these results to open/closed topological field theories in 2 dimensions.



Department of Mathematics
Michigan State University
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