Numerical Range of Moore–Penrose Inverse Matrices

Autor: Mao-Ting Chien
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Mathematics, Vol 8, Iss 5, p 830 (2020)
Druh dokumentu: article
ISSN: 2227-7390
DOI: 10.3390/math8050830
Popis: Let A be an n-by-n matrix. The numerical range of A is defined as W ( A ) = { x * A x : x ∈ C n , x * x = 1 } . The Moore–Penrose inverse A + of A is the unique matrix satisfying A A + A = A , A + A A + = A + , ( A A + ) * = A A + , and ( A + A ) * = A + A . This paper investigates the numerical range of the Moore–Penrose inverse A + of a matrix A, and examines the relation between the numerical ranges W ( A + ) and W ( A ) .
Databáze: Directory of Open Access Journals
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