1. Linear Maps Preserving the Closure of Numerical Range on Nest Algebras with Maximal Atomic Nest

   • Jianlian Cui
   • Jinchuan Hou

   Research article Pages: 253 - 266

2. On Subnormality and Formal Subnormality for Tuples of Unbounded Operators

   • Olivier Demanze

   Research article Pages: 267 - 284

3. The Matrix Multidisk Problem

   • Harry Dym
   • J. William Helton

   Research article Pages: 285 - 339

4. The Weighted Nehari-Dym-Gohberg Problem

   • S.A.M. Marcantognini
   • M.D. Morán
   • A. Octavio

   Research article Pages: 341 - 362

5. Toeplitz Operators Associated to Unimodular Algebras

   • Gerard J. Murphy

   Research article Pages: 363 - 375