Choi, Ji Young; Dealba, Luz Maria; Hogben, Leslie; Kivunge, Benard M; Nordstrom, Sandra K; Shedenhelm, Mike
(2003)
In this paperthe nonnegative
P
0
matrix completion problem is considered. It is
shown that a pattern for 4
×
4 matrices that includes all diagonal positions has nonnegative
P
0

completion if and only if its ...