The volume represents the proceedings of the 20th International Conference on Operator Theory, held in Timisoara (Romania), between June 30 and July 5, 2004. Besides a presentation of the life and works of G. K. Pedersen, it contains twenty-one refereed research papers written by leading experts in the field and by young researchers. These cover a large variety of topics of interest, including:

• single operator algebras
• C* algebras
• von Neumann algebras
• Hilbert and Banach modules
• differential and integral operators
• noncommutative probability
• spectral theory.

A publication of the Theta Foundation. Distributed worldwide, except in Romania, by the AMS.

Readership

Graduate students and research mathematicians interested in analysis.

Table of Contents

• D. Olesen and E. Størmer -- The life and works of Gert Kjærgaard Pedersen
• H. Bercovici -- On Boolean convolutions
• A. M. Bikchentaev -- Representation of elements of von Neumann algebras in the form of finite sums of products of projections. II
• E. Boasso -- On Cartan joint spectra
• J. Bračič -- Reflexivity of the space of module homomorphisms
• M. R. Buneci -- \(C^\ast\)-algebras associated to groupoids with proper orbit space
• G. Cassier and N. Suciu -- Analytic functions of a uniformly stable \(p\)-contraction
• R. Dumitru, C. Peligrad, and B. Vişinescu -- Automorphisms inner in the local multiplier algebra and Connes spectrum
• D. E. Dutkay and G. Picioroaga -- The von Neumann algebra of the canonical equivalence relation of the generalized Thompson group
• S. H. Ferguson and R. Rochberg -- Description of certain quotient Hilbert modules
• A. Gomilko, I. Wróbel, and J. Zemánek -- Numerical ranges in a strip
• A. Khosravi and B. Khosravi -- Frames in tensor products of Hilbert \(C^\ast\)-modules
• A. S. Kostenko -- Spectral analysis of some indefinite Sturm-Liouville operators
• V. G. Kravchenko, A. B. Lebre, and J. S. Rodríguez -- The kernel of singular integral operators with a finite group of linear-fractional shifts
• R. Nicoara -- On the finiteness of the number of \(N\)-dimensional Hopf \(C^\ast\)-algebras
• M. Popa -- A non-commutative analogue of Gaussian Hilbert spaces
• D. Popovici -- Dilatable solutions for some operator moment problems
• F. Rădulescu -- Combinatorial aspects of Connes's embedding conjecture and asymptotic distribution of traces of products of unitaries
• A. Sandovici -- Canonical extensions of symmetric linear relations
• L. Suciu -- Ergodic properties and saturation for \(A\)-contractions
• N. Suciu -- On the generalized Harnack domination for contractions
• L. Zielinski -- Semiclassical distributions of eigenvalues for elliptic operators with Hölder continuous coefficients, part II: critical case