Isotopy normalization of anyon diagrams

The convention in which the value of an unknotted, untwisted charge-

a

loop is its quantum dimension

d_{a}

. For multiplicity-free anyon fusion, a split-fuse bubble with input charges

a, b

and total charge

c

gives

d_{a} d_{b} / d_{c}

times the identity strand; the corresponding completeness resolution has coefficient

d_{c} / (d_{a} d_{b})

.

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