FILOMAT, cilt.33, sa.7, ss.2125-2133, 2019 (SCI-Expanded)
An element a in a Banach algebra A has ps-Drazin inverse if there exists p(2) = p is an element of comm(2)(a) such that (a - p)(k) is an element of J(A) for some k is an element of N. Let A be a Banach algebra, and let a, b is an element of have ps-Drazin inverses. If a(2)b = aba and b(2)a = bab, we prove that