English

A Lebesgue-type decomposition for non-positive sesquilinear forms

Functional Analysis 2023-10-31 v1

Abstract

A Lebesgue-type decomposition of a (non necessarily non-negative) sesquilinear form with respect to a non-negative one is studied. This decomposition consists of a sum of three parts: two are dominated by an absolutely continuous form and a singular non-negative one, respectively, and the latter is majorized by the product of an absolutely continuous and a singular non-negative forms. The Lebesgue decomposition of a complex measure is given as application.

Keywords

Cite

@article{arxiv.1803.02772,
  title  = {A Lebesgue-type decomposition for non-positive sesquilinear forms},
  author = {Rosario Corso},
  journal= {arXiv preprint arXiv:1803.02772},
  year   = {2023}
}

Comments

18 pages

R2 v1 2026-06-23T00:45:26.829Z