@article{article_894408, title={Left and right spectra}, journal={Communications Faculty of Sciences University of Ankara Series A1 Mathematics and Statistics}, volume={29}, year={1980}, DOI={10.1501/Commua1_0000000076}, author={Demirbaş, Mustafa}, keywords={spectra, Statistics, Mathematics}, abstract={The left spectrnm a\a) and tbe right spectrum c’^(a) of an element in a Banach algebra A are considered and some properties are proved. Operatör algebras in which, for every element T, a’(T) = o“^(T) are investigated, and a characterization of ct*(T) and o’^(T) is given.}, publisher={Ankara University}