OP-00111 Lean verified Full nonnegative rank of the quadratic correlation matrix NA · extended formulations · nonnegative rank · OpenProblemsInNLA · unique-disjointness matrices
OP-00112 Lean verified The nonnegative rank of the nine-point distance matrix NA · Euclidean distance matrices · nonnegative rank · OpenProblemsInNLA
OP-00203 Partially resolved Exact nonnegative rank of regular polygon slack matrices NA · extended formulations · nonnegative rank · OpenProblemsInNLA · regular polygons
OP-00204 Partially resolved Additivity for Cartesian-product slack matrices NA · Cartesian products · extended formulations · nonnegative rank · OpenProblemsInNLA