Spectrum of some summability methods on some sequence spaces

In this study, we deal with spectrum of some operators defined on sequencespaces.In the first chapter, the fundamental concepts and theorems related on subjectwhich are needed in the next chapters were given.In the second chapter, spectrum and fine spectrum of weighted mean, Cesà roand difference operators defined on some sequence spaces were examined.In the last chapter, we determined the fine spectrum of difference operatordefined on sequence space c0 and c. Also, fine spectrum of the operator representedby transpose of difference matrix was examined.ii