高阶数值范围的椭圆性
泛函分析
2026-03-23 v2
摘要
高阶数值范围是经典数值范围的一个推广概念,它在量子纠错中有应用。我们研究了对于具有关联Kippenhahn曲线由椭圆(最终为点)组成的2×2分块矩阵的这些集合。作为推论,我们以一种统一的方式推导出了椭圆型高阶数值范围结果,使用了Spitkovsky等人发展的方法。
引用
@article{arxiv.2512.02977,
title = {On the ellipticity of the higher rank numerical range},
author = {Natália Bebiano and Rute Lemos and Graça Soares},
journal= {arXiv preprint arXiv:2512.02977},
year = {2026}
}
备注
16 pages, 1 figure; revised text, corollary and remark moved from Section 2 to Section 3, previous Theorem 3.7 replaced by new Remark 3.2, restatement and condensed proofs for the last theorem and corollary