English

Degree $6$ hyperbolic polynomials and orders of moduli

Classical Analysis and ODEs 2024-10-10 v1

Abstract

We consider real univariate degree dd real-rooted polynomials with non-vanishing coefficients. Descartes' rule of signs implies that such a polynomial has c~\tilde{c} positive and p~\tilde{p} negative roots counted with multiplicity, where c~\tilde{c} and p~\tilde{p} are the numbers of sign changes and sign preservations in the sequence of its coefficients, c~+p~=d\tilde{c}+\tilde{p}=d. For d=6d=6, we give the exhaustive answer to the question: When the moduli of all 66 roots are distinct and arranged on the real positive half-axis, in which positions can the moduli of the negative roots be depending on the signs of the coefficients?

Keywords

Cite

@article{arxiv.2310.14698,
  title  = {Degree $6$ hyperbolic polynomials and orders of moduli},
  author = {Yousra Gati and Vladimir Petrov Kostov and Mohamed Chaouki Tarchi},
  journal= {arXiv preprint arXiv:2310.14698},
  year   = {2024}
}
R2 v1 2026-06-28T12:58:37.387Z