Interior points of the completely positive cone

Mirjam Duer, Georg Still
2008 The Electronic Journal of Linear Algebra  
A matrix A is called completely positive if it can be decomposed as A = BB T with an entrywise nonnegative matrix B. The set of all such matrices is a convex cone which plays a role in certain optimization problems. A characterization of the interior of this cone is provided.
doi:10.13001/1081-3810.1248 fatcat:eyafzo6e6vgfjgvvuhfo7jm2kq