A Note on the Joint Numerical Range of a Triple of 4-by-4 Hermitian Matrices

We present the degrees 14, 26 and 30 of the boundary generating surfaces of the joint numerical ranges for triples of 4-by-4 Hermitian matrices. This result completes the missing degrees from a previous study.

Authors

Mao-Ting Chien (ORCID: https://orcid.org/0000-0001-5608-9487)
Hiroshi Nakazato (ORCID: https://orcid.org/0000-0003-1104-7472)

Institutions

Hirosaki University (JP)
Soochow University (TW)

Publication Details

Journal: Mathematics
Published: 2025-12-13
DOI: https://doi.org/10.3390/math13243977
Primary Topic: Matrix Theory and Algorithms
Type: article
Field-Weighted Citation Impact: 0.00

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article

A Note on the Joint Numerical Range of a Triple of 4-by-4 Hermitian Matrices

Mao-Ting Chien, Hiroshi Nakazato

Dec 13, 2025

Mathematics

Matrix Theory and Algorithms

article

A Note on the Joint Numerical Range of a Triple of 4-by-4 Hermitian Matrices

Mao-Ting Chien, Hiroshi Nakazato

December 13, 2025article en

Abstract

MathematicsVol. 13(24)

Hirosaki University (JP), Soochow University (TW)

Openalex Percentile: Top 61%

Matrix Theory and Algorithms

DOI Open Access PDF OpenAlex

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A Note on the Joint Numerical Range of a Triple of 4-by-4 Hermitian Matrices — Mao-Ting Chien, Hiroshi Nakazato · Mathematics (2025) | TGRS Research Map | TGRS