Let $\alpha$ be an algebraic integer all of whose conjugates lie in a sector $ | \operatorname{arg {\ z | \leq \theta$}
with $ 0 \leq \theta <90^\circ$. Using the method of explicit auxiliary functions, we compute the greatest lower bound
$v(\theta)$ of the absolute trace of $\alpha$, for $\theta$ belonging to seven subintervals of $[0,90^\circ)$.
The polynomials involved in the auxiliary functions are found by Wu's algorithm.
@article{1243429957,
author = {Flammang, V.},
title = {On the Absolute Trace of Polynomials Having All Zeros in a Sector},
journal = {Experiment. Math.},
volume = {17},
number = {1},
year = {2008},
pages = { 443-450},
language = {en},
url = {http://dml.mathdoc.fr/item/1243429957}
}
Flammang, V. On the Absolute Trace of Polynomials Having All Zeros in a Sector. Experiment. Math., Tome 17 (2008) no. 1, pp. 443-450. http://gdmltest.u-ga.fr/item/1243429957/