3 papers
math.NA2025
On rank-2 Nonnegative Matrix Factorizations and their variants
Etna Lindy, Vanni Noferini, Paul Van Dooren
We consider the problem of finding the best nonnegative rank-2 approximation of an arbitrary nonnegative matrix. We first revisit the theory, including an explicit parametrization…
math.NA2025
On computing the zeros of a class of Sobolev orthogonal polynomials
Nicola Mastronardi, Marc Van Barel, Raf Vandebril +1
A fast and weakly stable method for computing the zeros of a particular class of hypergeometric polynomials is presented. The studied hypergeometric polynomials satisfy a higher or…
math.NA2024
Minimal rank factorizations of polynomial matrices
Andrii Dmytryshyn, Froilán Dopico, Paul Van Dooren
We investigate rank revealing factorizations of polynomial matrices into products of three, , or two, , polynom…