摘要： For any two 3-by-3 companion matrices A and B with identical numerical ranges, we give a necessary and sufficient condition for A=B in terms of the shapes of numerical ranges and the locations of eigenvalues. In addition, all distinct 3-by-3 companion matrices with identical numerical ranges can be obtained precisely. 出版者： Elsevier Inc 出版日期： 2015-10-01 出處： Linear algebra and its applications, 2015-10, Vol.482, p.84-100 資源來源： Elsevier ScienceDirect Journals Complete - Autoholdings 版權： 2015 Elsevier Inc. 識別號： ISSN: 0024-3795 識別號： EISSN: 1873-1856 識別號： DOI: 10.1016/j.laa.2015.05.014
