Functions of unitaries with Sp-perturbations for non-continuously differentiable functions
Abstract
Consider a function f:T→C, n-times differentiable on T and such that its nth derivative f(n) is bounded but not necessarily continuous. Let U:R→U(H) be a function taking values in the set of unitary operators on some separable Hilbert space H. Let 1
Fields of Study & Subjects
Holomorphic and Operator Theory
Advanced Banach Space Theory
Advanced Operator Algebra Research
Publication details
- Journal / source
- Studia Mathematica
- Publication date
- 18 January 2026