Fusion rules on a parametrized series of graphs

Abstract

A series of pairs of graphs (Gammak, Gamma'k), k = 0,1,2,... has been considered as candidates for dual pairs of principal graphs of subfactors of small Jones index above 4 and it has recently been proved that the pair (Gammak, Gamma'k) comes from a subfactor if and only if k = 0 or k =1. We show that nevertheless there exists a unique fusion system compatible with this pair of graphs for all non-negative integers k.

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