On classifying monotone complete algebras of operators

Kazuyuki Saito, J D Maitland Wright

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


We give a classificaion of "small" monotone complete C*-algebras by order properties. We construct a corresponding semigroup. This classification filters out von Neumann algebras; they are mapped to the zero of the classifying semigroup. We show that there are 2 to the power of the continuum distinct equivalence classes. This remains true when the clasification is restricted to special classes of monotone complete C*-algebras e.g. factors, injecive factors, injective operator systems and commutative algebras with separable structure space. Some examples and applications are given.
Original languageEnglish
Pages (from-to)321-355
Number of pages35
JournalRicerche di Matematica
Issue number2
Publication statusPublished - 20 Nov 2007


  • monotone complete C*-algebras
  • operator algebras
  • semilattices


Dive into the research topics of 'On classifying monotone complete algebras of operators'. Together they form a unique fingerprint.

Cite this