Mathematical Research Letters

Volume 16 (2009)

Number 5

On formal codegrees of fusion categories

Pages: 895 – 901

DOI: http://dx.doi.org/10.4310/MRL.2009.v16.n5.a11

Author

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

Abstract

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.

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