English

The Fuglede Theorem and Some Intertwining Relations

Functional Analysis 2019-01-29 v1

Abstract

In this paper, we show a new and classic version of the celebrated Fuglede Theorem in an unbounded setting. A related counterexample is equally presented. In the second strand of the paper, we give a pair of a closed and self-adjoint (unbounded) operators which is not intertwined by any (bounded or closed) operator except the zero operator.

Keywords

Cite

@article{arxiv.1901.09271,
  title  = {The Fuglede Theorem and Some Intertwining Relations},
  author = {Ikram Fatima Zohra Bensaid and Souheyb Dehimi and Bent Fuglede and Mohammed Hichem Mortad},
  journal= {arXiv preprint arXiv:1901.09271},
  year   = {2019}
}

Comments

08 pages

R2 v1 2026-06-23T07:23:06.346Z