2 papers
math.RA2019
The NMF problem and lattice-subspaces
Ioannis A. Polyrakis
Suppose that is a nonnegative real matrix. The NMF problem is the determination of two nonnegative real matrices , so that with intermediate dimension…
q-fin.CP2010
Computation of vector sublattices and minimal lattice-subspaces of R^k. Applications in finance
V. N. Katsikis, I. A. Polyrakis
In this article we perform a computational study of Polyrakis algorithms presented in [12,13]. These algorithms are used for the determination of the vector sublattice and the mini…