Generalized cluster algebra and Teichmüller spaces of Riemann surfaces with orbifold points of arbitrary order (joint with L.Chekhov)
Presenter
November 2, 2012
Keywords:
- algebraic combinatorics
- commutative algebra
- cluster algebra
- orbifolds
- Teichmuller space
- hyperbolic geometry
- mutations
- punctured Riemann surfaces
MSC:
- 13F60
- 13F55
- 13Fxx
- 13-xx
- 05-xx
- 06-xx
- 32G15
- 32G20
- 32G34
- 32Gxx
- 57R18
- 57R05
- 57Rxx
Abstract
We generalize a new class of cluster type mutations for which exchange transformations are given by reciprocal polynomials. In the case of second-order polynomials of the form x + 2cos(pi / n_0) + x^-1 these transformations are related to triangulations of Riemann surfaces of arbitrary genus with at least one hole / puncture and with an arbitrary number of orbifold points of arbitrary integer orders n_0. We propose the dual graph description of the corresponding Teichmuller spaces, construct the Poisson algebra of the Teichmuller space coordinates, propose the combinatorial description of the corresponding geodesic functions and find the mapping class group transformations.