Abstract
A necessary and sufficient condition for a bounded operator to be a composition operator is investigated in this paper. Normal, quasi-hyponormal, paranormal composition operators are characterised.
Open AccessSome results on composition operators on
Some results on composition operators on ℓ 2
Received12 Aug 1978
Copyright
Copyright © 1979 Hindawi Publishing Corporation. This is an open access article distributed under the
Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.