Some results on composition operators on ℓ2
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.
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
1979-01-01
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| Series: | International Journal of Mathematics and Mathematical Sciences |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1155/S016117127900003X |
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| Summary: | 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. |
|---|---|
| ISSN: | 0161-1712 1687-0425 |