Abstract

In this paper we investigate a new measure of non-strict-singularity and a new measure of non-strict-cosingularity. Measures of non-strict-singularity and of non-strict-cosingularity have been investigated in [11], [8], [12], [7], [9], [15].

Keywords: Strictly (co)singular operators, measures of non-strict-(co)singularity, semi-Fredholm operators.

MSC: 47A10, 47A53

Pages:  1--7     

Volume  54 ,  Issue  1$-$2 ,  2002