Essential spectra of spectral operators |
| |
Authors: | B Nagy |
| |
Institution: | (1) Budapesti Mszaki Egyetem Vegyészmérnöki Kar Matematika Tanszék, Stoczek U. 2-4, H-1521 Budapest, Hungary |
| |
Abstract: | The various essential spectra of a linear operator have been surveyed byB. Gramsch andD. Lay 4]. In this paper we characterize the essential spectra and the related quantities nullity, defect, ascent and descent of bounded spectral operators. It is shown that a number of these spectra coincide in the case of a spectral or a scalar type operator. Some results known for normal operators in Hilbert space are extended to spectral operators in Banach space. |
| |
Keywords: | Primary 47B40 47A10 Secondary 47B15 47B30 |
本文献已被 SpringerLink 等数据库收录! |