Differentiability of the g-Drazin inverse
J. J. Koliha, Vladimir Rakočević · Studia Mathematica · 2005
If $A(z)$ is a function of a real or complex variable with values in the space $B(X)$ of all bounded linear operators on a Banach space $X$ with each $A(z)$ $g$-Drazin invertible, we study conditions under which the $g$-Drazin inverse ${A}^{\sf D}(z)$ is