Open AccessSpectral mapping theorem and Weyl’s theorem for (m,n)-paranormal operators
Author(s) -
Preeti Dharmarha,
Sonu Ram
Publication year - 2021
Publication title -
filomat
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.449
H-Index - 34
eISSN - 2406-0933
pISSN - 0354-5180
DOI - 10.2298/fil2110293d
Subject(s) - mathematics , hilbert space , operator (biology) , pure mathematics , paranormal , discrete mathematics , medicine , biochemistry , chemistry , alternative medicine , repressor , pathology , transcription factor , gene
In the present paper, we prove spectral mapping theorem for (m,n)-paranormal operator T on a separable Hilbert space, that is, f (?w(T)) = ?w(f(T)) when f is an analytic function on some open neighborhood of ?(T). We also show that for (m,n)-paranormal operator T, Weyl?s theorem holds, that is, ?(T)-?w(T) = ?00(T). Moreover, if T is algebraically (m,n)-paranormal, then spectral mapping theorem and Weyl?s theorem hold.