Davis-Wielandt shells of 4 by 4 matrices

In this paper, we study possible degrees of the boundary generating surfaces of the Davis-Wielandt shells of 4-by-4 upper triangular unitarily irreducible matrices. The degree can be any even number between 6 and 36 except 14,26 and 30.

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Publication Details

Journal
Linear Algebra and its Applications
Published
2025-06-16
DOI
https://doi.org/10.1016/j.laa.2025.06.006
Primary Topic
Matrix Theory and Algorithms
Type
article
Field-Weighted Citation Impact
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article

Davis-Wielandt shells of 4 by 4 matrices

Mao-Ting Chien, Hiroshi Nakazato
Linear Algebra and its Applications
Matrix Theory and Algorithms
article

Davis-Wielandt shells of 4 by 4 matrices

Mao-Ting Chien, Hiroshi Nakazato
article en

Abstract

In this paper, we study possible degrees of the boundary generating surfaces of the Davis-Wielandt shells of 4-by-4 upper triangular unitarily irreducible matrices. The degree can be any even number between 6 and 36 except 14,26 and 30.

Linear Algebra and its ApplicationsVol. 723
Hirosaki University (JP), Soochow University (TW)
Openalex Percentile: Top 85%
Matrix Theory and Algorithms
DOIOpen Access PDFOpenAlex
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Davis-Wielandt shells of 4 by 4 matrices — Mao-Ting Chien, Hiroshi Nakazato · Linear Algebra and its Applications (2025) | TGRS Research Map | TGRS