Some results on composition operators on ℓ 2

R. K. Singh, D. K. Gupta and B. S. Komal

International Journal of Mathematics and Mathematical Sciences, 1979, vol. 2, 1-6

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.

Date: 1979
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Persistent link: https://EconPapers.repec.org/RePEc:hin:jijmms:674818

DOI: 10.1155/S016117127900003X

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