REMARKS ON COMPLETELY POSITIVE MATRICES
XU Chang qing (Department of Mathematics, Anhui University, 230039, Hefei, Anhui, China)
The paper gives out a sufficient condition for a doubly nonnegative matrix of order 5 to be completely positive. Also we investigate completely positive factorizations on the integer rings Z + for the doubly nonnegative matrices of order 2 and order 3(with the determination of their factorization index).
【CateGory Index】： O151.21