English

SOS Polynomials and Matrix Representations of Rational Real Functions

Complex Variables 2022-11-28 v1

Abstract

The characteristic properties of Artin's denominators in Hilbert's 17th problem are obtained. It is proved that numerators of partial derivative of rational real function from the Nevanlinna class are SOS polynomials.

Keywords

Cite

@article{arxiv.2211.13946,
  title  = {SOS Polynomials and Matrix Representations of Rational Real Functions},
  author = {M. F. Bessmertnyi},
  journal= {arXiv preprint arXiv:2211.13946},
  year   = {2022}
}

Comments

19 pages

R2 v1 2026-06-28T07:12:23.244Z