Let A be a square complex matrix. Let P be one of the following properties: (a) A is an EP matrix, (b) the column space of A is complementary to the column space of A, and (c) the orthogonal complement of the column space ...
The well-known classes of EP matrices and normal matrices are de-
fined by the matrices that commute with their Moore-Penrose inverse
and with their conjugate transpose, respectively. This paper investigates
the class ...
[EN] The space of n x n complex matrices with the star partial order is considered in the first part of this paper. The class of EP matrices is analyzed and several properties related to this order are given. In addition, ...