One-dimensional perturbation of operators
One-dimensional perturbations of isometries are discussed. The main result is that ''certain rank one operators of small norm will split off a unitary piece from the shift''. The theorem has two applications to the perturbation theory.
One-dimensional perturbations of isometries
certain rank one operators of small norm will split off a unitary piece from the shift
scientific article; zbMATH DE number 3931820