Matrices A such that AA†−A†A are nonsingular
نویسندگان
چکیده
منابع مشابه
Matrices A such that AA+ - A+A are nonsingular
In this paper we study the class of square matrices A such that AA − AA is nonsingular, where A stands for the Moore–Penrose inverse of A. Among several characterizations we prove that for a matrix A of order n, the difference AA−AA is nonsingular if and only if R(A) ⊕ R(A) = Cn,1, where R(·) denotes the range space. Also we study matrices A such that R(A) = R(A).
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ژورنال
عنوان ژورنال: Applied Mathematics and Computation
سال: 2010
ISSN: 0096-3003
DOI: 10.1016/j.amc.2010.09.022