On the numerical index of absolute symmetric norms on the plane
Functional Analysis
2020-05-04 v2
Abstract
We give a lower bound for the numerical index of two-dimensional real spaces with absolute and symmetric norm. This allows us to compute the numerical index of the two-dimensional real -space for .
Cite
@article{arxiv.2002.07529,
title = {On the numerical index of absolute symmetric norms on the plane},
author = {Javier Merí and Alicia Quero},
journal= {arXiv preprint arXiv:2002.07529},
year = {2020}
}
Comments
This article has been accepted for publication in Linear and Multilinear Algebra, published by Taylor & Francis