English

$(S+N)$-triangular operators: spectral properties and important examples

Spectral Theory 2016-11-03 v2 Classical Analysis and ODEs

Abstract

We introduce a notion of (S+N)(S+N)-triangular operators in the Hilbert space using some basic ideas from triangular representation theory. Our notion generalizes the well-known notion of the spectral operators so that many properties of the (S+N)(S+N)-triangular operators coincide with those of spectral operators. At the same time we show that wide classes of operators are (S+N)(S+N)-triangular.

Keywords

Cite

@article{arxiv.1501.02831,
  title  = {$(S+N)$-triangular operators: spectral properties and important examples},
  author = {Lev Sakhnovich},
  journal= {arXiv preprint arXiv:1501.02831},
  year   = {2016}
}

Comments

In this version of the paper, small misprints are removed, the style is improved and some references are added

R2 v1 2026-06-22T07:59:03.549Z