Ammar, Aymen; Fakhfakh, Slim; Jeribi, Aref(Universitat Politècnica de València, 2022-10-03)
[EN] We first attempt to determine conditions on a linear relation T such
that µT becomes a demicompact linear relation for each µ ∈ [0, 1) (see
Theorems 2.4 and 2.5). Second, we display some results on Fredholm
and ...
In this paper, we investigate additive results of the Drazin inverse of elements in
a ring R. Under the condition ab = ba, we show that a + b is Drazin invertible if and only if aa^D(a+b) is Drazin invertible, where the ...