This ticket is a successor to #27036.

The Virasoro central charge of a FusionRing is computed using the formula for WZW conformal field theories. This allows us to coerce the square root of the global quantum dimension into the cyclotomic field and normalize the S-matrix. So there are a lot of benfits.

Here is a temporary link to a build of the documentation:

http://match.stanford.edu/reference/combinat/sage/combinat/root_system/fusion_ring.html

Depends on #27036

CC: @tscrim @sagetrac-sage-combinat @dwbump @willieab

Component: combinatorics

Author: Daniel Bump, Guillermo Aboumrad

Branch/Commit: c3a8036

Reviewer: Travis Scrimshaw

Issue created by migration from https://trac.sagemath.org/ticket/29615