Singly generated planar algebras of small dimension. II. (English) Zbl 1041.46048

The following theorem is proved: Let \({\mathcal P}= \{P_k\}_{k\geq 0}\) be a spherical \(C^*\)-planar algebra generated by a non-trivial element in \(P_2\) (i.e. an element not contained in the Temperley-Lieb subalgebra of \(P_2\)) subject to the conditions \(\dim P_2= 3\) and \(\dim P_3= 13\). Then \({\mathcal P}\) is the standard invariant of the crossed product subfactor \(R\ltimes \mathbb{Z}_2\subset R\ltimes D_5\). Thus there is precisely one spherical \(C^*\)-planar algebra \({\mathcal P}\) subject to the above conditions.
This somewhat unexpected result complements the classification of planar algebras arising from subfactors with \(\dim P_3\leq 12\) which the authors gave in Part I of this paper [Duke Math. J. 101, 41–75 (2000; Zbl 1075.46053)].


46L37 Subfactors and their classification
46L10 General theory of von Neumann algebras


Zbl 1075.46053
Full Text: DOI


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