On quasinilpotent operators, II

Ciprian Foiaş, Il Bong Jung, Eungil Ko, Carl Pearcy

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


In this paper we continue to modify and expand a technique due to Enflo for producing nontrivial hyperinvariant subspaces for quasinilpotent operators, and thereby obtain such subspaces for some additional quasinilpotent operators on Hilbert space. We also obtain a structure theorem for a certain class of operators.

Original languageEnglish
Pages (from-to)349-356
Number of pages8
JournalJournal of the Australian Mathematical Society
Issue number3
StatePublished - Dec 2004

Bibliographical note

Funding Information:
This research was supported by a grant from the Korea Research Foundation (KRF 2002-070-C00006).


  • Hyperinvariant subspaces
  • Quasinilpotent operators


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