We examine whether (and under what conditions) intertwining operators of minimal models in the theory of vertex operator algebras define congruence representations of the modular group.
Links:
[1] http://www.mpim-bonn.mpg.de/taxonomy/term/39
[2] http://www.mpim-bonn.mpg.de/node/3444
[3] http://www.mpim-bonn.mpg.de/node/246