2 papers
math.OA2008
Group-type subfactors and Hadamard matrices
Richard D. Burstein
A hyperfinite subfactor may be obtained from a symmetric commuting square via iteration of the basic construction. For certain commuting squares constructed from Hadamard ma…
math.OA2008
Commuting-Square Subfactors and Central Sequences
Richard Burstein
Let be a finite-index infinite-depth hyperfinite subfactor and a free ultrafilter of the natural numbers. We show that if this subfactor is constructed…