(∞,C)-isometric operators

Muneo Chō, Eungil Ko, Ji Eun Lee

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


In this paper we study properties of (∞,C)-isometric operators. In particular, we prove that if T is an (∞,C)-isometry and Q is a quasinilpotent operator, then T + Q is an (∞,C)-isometry under suitable conditions. Moreover, we show that the class of (∞,C)-isometric operators is norm closed. Finally, we investigate properties of products and tensor products of (∞,C)-isometric operators.

Original languageEnglish
Pages (from-to)793-806
Number of pages14
JournalOperators and Matrices
Issue number3
StatePublished - Sep 2017

Bibliographical note

Publisher Copyright:
© 2017, Element D.O.O. All rights reserved.


  • (∞,C)-isometric operator
  • M-isometric operator
  • Quasinilpotent operator


Dive into the research topics of '(∞,C)-isometric operators'. Together they form a unique fingerprint.

Cite this