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An extension of Putnam-Fuglede theorem for hyponormal operators

✍ Scribed by M. Radjabalipour

Publisher
Springer-Verlag
Year
1987
Tongue
French
Weight
195 KB
Volume
194
Category
Article
ISSN
0025-5874

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πŸ“œ SIMILAR VOLUMES

On extensions of some Flugede–Putnam typ
On extensions of some Flugede–Putnam type theorems involving (p, k)-quasihyponormal, spectral, and dominant operators
✍ Kotaro Tanahashi; S. M. Patel; Atsushi Uchiyama πŸ“‚ Article πŸ“… 2009 πŸ› John Wiley and Sons 🌐 English βš– 146 KB

## Abstract A Hilbert space operator __S__ is called (__p, k__)‐quasihyponormal if __S__ \*^__k__^ ((__S__ \*__S__)^__p__^ – (__SS__ \*)^__p__^ )__S^k^__ β‰₯ 0 for an integer __k__ β‰₯ 1 and 0 < __p__ ≀ 1. In the present note, we consider (__p, k__)‐quasihyponormal operator __S__ ∈ __B__ (__H__) such