The classification conjecture for subfactors of index between 5 and 3+53+\sqrt{5}

About 14 years old · traced to

Let N⊂MN\subset M be a subfactor with index in the interval (5,3+5)(5,3+\sqrt{5}). Its principal graph is the graph describing the associated standard invariant; write A∞A_\infty for the infinite AA-type principal graph. The paper also specifies two further principal-graph pairs, denoted here by Γ(A)\Gamma(\mathcal A) and Γ(B)\Gamma(\mathcal B).

Classification conjecture. Any subfactor with index in (5,3+5)(5,3+\sqrt{5}) has principal graph A∞A_\infty, Γ(A)\Gamma(\mathcal A), or Γ(B)\Gamma(\mathcal B).

The theorem preceding this statement proves the assertion for 1-supertransitive subfactors, while the conjecture removes that hypothesis and is left open by the paper.

References

Primary source

Scott Morrison and Emily Peters, “The little desert? Some subfactors with index in the interval (5,3+5)”, arXiv:1205.2742 (2012).

Progress summary

Never refreshed

Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.

Solutions 0

No solutions have been posted yet.