On the derived towers of certain inclusions of type IIIλ factors of index 4
Given an inclusion of type IIIλ factors, λ ≠ 0,1, of index 4 and with a common discrete decomposition, we compute the principal graph of its derived tower based on that on the associated type II1 inclusion. Applications to the classification problem of hyperfinite type IIIλ subfactors are discussed. © 1994 by Pacific Journal of Mathematics.
(1994). On the derived towers of certain inclusions of type IIIλ factors of index 4. Pacific Journal of Mathematics, 165 (2), 321-345.