1. On closures of similarity orbits of essentially nilpotent operators of order two

   • Constantin Apostol
   • Domingo A. Herrero

   OriginalPaper Pages: 437 - 461

2. On the regularity of the critical point infinity of definitizable operators

   • Branko Ćurgus

   OriginalPaper Pages: 462 - 488

3. On closures of joint similarity orbits

   • Raúl E. Curto
   • Domingo A. Herrero

   OriginalPaper Pages: 489 - 556

4. The uniform algebra associated with a cyclic subnormal operator

   • Marc Raphael

   OriginalPaper Pages: 557 - 572