Jason Bogovich

Black-hole microstate counting in an asymmetric Z5 CHL model outside M24: positivity, blind growth tests and exact Rademacher expansions

We study the dyon counting functions of a four-dimensional N=4 string model whose symmetry lies outside the Mathieu group M_24: the CHL model built from the quantum Z_5 symmetry Q (Frame shape 1^-1 5^5, Conway class 5C) of the K3 model that Gaberdiel and Volpato obtain as an asym...