Antieigenvalue inequalities in operator theory.
Construction of Dilations of Positive Lp-Contractions.
Ein „merkwürdiges” Spektrum für nichtlineare Operatoren
We define a spectrum for Lipschitz continuous nonlinear operators in Banach spaces by means of a certain kind of "pseudo-adjoint" and study some of its properties.
Коммутативные группы изометрий пространств Минковского