Orthogonal Idempotents and Continuous Fredholm Operators under Perturbations
K.W Nyaluke, Benard Okelo, Omolo Ongati · International Journal of Modern Computation Information and Communication Technology · 2020
In the present work, authors presented characterization on continuity of Fredholm operators when perturbed by orthogonal idempotents in Banach space. In particular, authors show that these operators are continuous under pertubations in Hilbert spaces.