Mathematical Research Letters

Volume 16 (2009)

Number 5

On formal codegrees of fusion categories

Pages: 895 – 901



Victor Ostrik (Department of Mathematics, University of Oregon, Eugene, Or., U.S.A.)


We prove a general result which implies that the global and Frobenius–Perron dimensions of a fusion category generate Galois invariant ideals in the ring of algebraic integers.

Published 1 January 2009