On the Classification of Almost Square-Free Modular Categories

Abstract

Let (Formula presented.) be a modular category of Frobenius-Perron dimension dqn, where q > 2 is a prime number and d is a square-free integer. We show that (Formula presented.) must be integral and nilpotent and therefore group-theoretical. In the case where q = 2, we describe the structure of (Formula presented.) in terms of equivariantizations of group-crossed braided fusion categories.