We show that an n-by-n companion matrix A can have at most n line segments on the boundary NW (A) of its numerical range W(A), and it has exactly n line segments on NW (A) if and only if, for n odd, A is unitary, and, for n even, A is unitarily equivalent to the direct sum A 1 โ A 2 of two (n/2)-by-
โฆ LIBER โฆ
A definition of numerical range of rectangular matrices
โ Scribed by Chorianopoulos, Ch.; Karanasios, S.; Psarrakos, P.
- Book ID
- 127361763
- Publisher
- Taylor and Francis Group
- Year
- 2009
- Tongue
- English
- Weight
- 676 KB
- Volume
- 57
- Category
- Article
- ISSN
- 0308-1087
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