A Kadison Kastler row metric and intermediate subalgebras

Perturbations of von Neumann subalgebras with finite index

“…The author and Watatani showed that for an inclusion of simple C * -algebras with finite index, sufficiently close intermediate C * -subalgebras are unitarily equivalent in [10]. Although our constants depend on inclusions, Dickson got universal constants independent of inclusions in [9].…”