Functions of operators and their commutators in perturbation theory
Volume 30 / 1994
Banach Center Publications 30 (1994), 147-159
DOI: 10.4064/-30-1-147-159
Abstract
This paper shows some directions of perturbation theory for Lipschitz functions of selfadjoint and normal operators, without giving precise proofs. Some of the ideas discussed are explained informally or for the finite-dimensional case. Several unsolved problems are mentioned.
