Results 41 to 43 of about 127 (43)

Some range-kernel orthogonality results for generalized derivation

, 2018
In this paper, some range-kernel orthogonality results to p-w-hyponormal operators and (Y) or dominant operators are given, also we will generalize some commutativity results.
A. Bachir, Nadiah Zafer Al-shehri
semanticscholar   +1 more source

An extension of Fuglede-Putnam theorem for certain posinormal operators

, 2013
An asymmetric Fuglede-Putnam Theorem for certain posinormal operators is proved. As a consequence of this result, we obtain that the range of the generalized derivation induced by these classes of operators is orthogonal to its kernel.
A. Bachir
semanticscholar   +1 more source

Minimal shape-preserving projections onto Π n

, 1997
In this paper are determined minimal shape–preserving projections onto the n–th degree algebraic polynomials. 1985 Mathematics Subject Classification: Primary 46B20; Secondary 47A30.
M. Prophet, B. Chalmers, F. Metcalf
semanticscholar   +1 more source