Open AccessFuglede – Putnam type theorems for extension of -hyponormal operators
Author(s) -
Salah Mecheri,
T. Prasad
Publication year - 2022
Publication title -
ukraïnsʹkij matematičnij žurnal
Language(s) - English
Resource type - Journals
ISSN - 1027-3190
DOI - 10.37863/umzh.v74i1.2355
Subject(s) - extension (predicate logic) , type (biology) , mathematics , operator theory , operator (biology) , pure mathematics , discrete mathematics , algebra over a field , computer science , chemistry , programming language , ecology , biochemistry , repressor , transcription factor , gene , biology
UDC 517.9We consider -quasi--hyponormal operator suchthat for some and prove the Fuglede–Putnam type theorem when adjoint of is -quasi--hyponormal or dominant operators.We also show that two quasisimilar -quasi--hyponormal operators have equal essential spectra.