Imagen de un sistema ortogonal completo de rayos por un operador lineal acotado.
Interchangeability of unbounded linear operators: General theory of transmutativity
Invariance properties of an operator product involving generalized inverses.
Inverses et propriétés spectrales des matrices de Toeplitz à symbole singulier
Invertibility of matrix Wiener--Hopf plus Hankel operators with APW Fourier symbols.
Invertibility of the commutator of an element in a C*-algebra and its Moore-Penrose inverse
We study the subset in a unital C*-algebra composed of elements a such that is invertible, where denotes the Moore-Penrose inverse of a. A distinguished subset of this set is also investigated. Furthermore we study sequences of elements belonging to the aforementioned subsets.
Iterated series and the Hellinger-Toeplitz theorem.
We show that an iterated double series condition due to Antosik implies the uniform convergence of the double series. An application of Antosik's condition is given to the derivation of a vector form of the Hellinger-Toeplitz theorem.