Ciprian Foiaş

Two Banach Space Methods and Dual Operator Algebras

Abstract In this paper we present several new slightly nonlinear variants of the bipolar and the open mapping theorems in Banach spaces, which we abstracted from the recent developments in the theory of dual operator algebras. A new application of our techniques to the theory of operator algebras is also given.

Nonselfadjoint Operator Algebras, Operator Theory, and Related Topics

This volume, dedicated to Carl Pearcy on the occasion of his 60th birthday, presents recent results in operator theory, nonselfadjoint operator algebras, measure theory and the theory of moments. The book includes a biographical sketch of Pearcy and a list of his publications.

Biquasitriangular Operators and Quasisimilarity

The authors consider the question of whether the class (BQT)qs consisting of all those (bounded) operators on a fixed Hilbert space H that are quasisinilar to some biquasitriangular operator is equal to the algebra L(H) of all operators on the space. It is shown that (BQT)qs is at least norm-dense in L(H).