January 2023
Ten chapters of the Zbornik radova 20(28), edited by Dragan Đorđević, present the authors’ results focused on topics in contemporary operator theory: invertibility and generalized invertibility of linear operators on Banach spaces, Hilbert spaces and Hilbert C∗-modules, Fredholm theory, Riesz operators, sequence spaces, stochastic operators, majorization theory, partial orderings, spaces with indefinite inner products, as well as applications to some singular matrix and operator equations.