The Generalized West Decomposition of Operators and Other Compact Perturbation Problems

A bound for functions defined on a normed space

“…Clearly, theorem 1.1 improves (1.2). It supplements the very interesting recent perturbation results; cf [1,2,7,9] and references therein.…”

A New Identity for Resolvents of Operators

“…At the same time, if 0 (as in the above given examples), then eorem 8 and Corollary 9 give us the sharp result hd 0. eorem 6 supplements the recent perturbation results for operators see the interesting papers [4][5][6][7][8][9] and references given therein.…”