Applications of operator space theory to nest algebra bimodules

TL;DR

This paper characterizes weak* rigged modules over nest algebras, linking their structure to continuous nest homomorphisms and providing insights into their properties and representations.

Contribution

It provides a complete characterization of weak* rigged modules over nest algebras using continuous nest homomorphisms and representation theory.

Findings

Characterization of weak* rigged modules over nest algebras.

Connection between modules and continuous nest homomorphisms.

Properties preserved by continuous CSL homomorphisms.

Abstract

Recently Blecher and Kashyap have generalized the notion of W* modules over von Neumann algebras to the setting where the operator algebras are \sigma- weakly closed algebras of operators on a Hilbert space. They call these modules weak* rigged modules. We characterize the weak* rigged modules over nest algebras . We prove that Y is a right weak* rigged module over a nest algebra Alg(M) if and only if there exists a completely isometric normal representation \phi of Y and a nest algebra Alg(N) such that Alg(N)\phi(Y)Alg(M) \subset \phi(Y) while \phi(Y) is implemented by a continuous nest homomorphism from M onto N. We describe some properties which are preserved by continuous CSL homomorphisms.