Open AccessQuasi-posinormal operators
Author(s) -
Baghdad Science Journal
Publication year - 2010
Publication title -
mağallaẗ baġdād li-l-ʿulūm
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.167
H-Index - 6
eISSN - 2411-7986
pISSN - 2078-8665
DOI - 10.21123/bsj.7.3.1282-1287
Subject(s) - quasinormal operator , operator theory , operator (biology) , mathematics , nuclear operator , compact operator on hilbert space , operator norm , hilbert space , finite rank operator , pure mathematics , spectral theorem , hermitian adjoint , compact operator , class (philosophy) , algebra over a field , weak operator topology , computer science , banach space , chemistry , artificial intelligence , biochemistry , repressor , transcription factor , extension (predicate logic) , gene , programming language
In this paper, we introduce a class of operators on a Hilbert space namely quasi-posinormal operators that contain properly the classes of normal operator, hyponormal operators, M–hyponormal operators, dominant operators and posinormal operators . We study some basic properties of these operators .Also we are looking at the relationship between invertibility operator and quasi-posinormal operator .