Central Extension of Mapping Class Group via Chekhov-Fock Quantization
arXiv:1410.5551
Abstract
The central extension of mapping class groups of punctured surfaces of finite type that arises in Chekhov-Fock quantization is 12 times of the Meyer class plus the Euler classes of the punctures, which agree with the one arising in the Kashaev quantization.
15 pages, 6 figures