Title of article :
The perturbation classes problem in Fredholm theory
Author/Authors :
Manuel Gonza´ lez1، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2003
Abstract :
We give a negative answer to the perturbation classes problem: the perturbation class of the upper semi-Fredholm operators contains properly the strictly singular operators, and the perturbation class of the lower semi-Fredholm operators contains properly the strictly cosingular operators
Keywords :
Semi-Fredholm operator , Strictly singular operator , Perturbation class
Journal title :
Journal of Functional Analysis
Journal title :
Journal of Functional Analysis
