On the fine spectrum of the upper triangle double band matrix $\Delta^+$ on the sequence space $c_0$
Abstract
In this study, we determine the fine spectrum of the matrix operator $\Delta^+$ defined by an upper triangle double band matrix acting on the sequence space $c_0$ with respect to the Goldberg's classification. As a new development, we give the approximate point spectrum, defect spectrum and compression spectrum of the matrix operator $\Delta^+$ on $c_{0}$.
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PDFISSN: 1331-0623 (Print), 1848-8013 (Online)