In mathematics, specifically linear algebra, a real symmetric matrix A is copositive if x ⊤ A x ≥ 0 {\displaystyle x^{\top }Ax\geq 0} for every nonnegative...

matrices used in mathematics, science and engineering. A matrix (plural matrices, or less commonly matrixes) is a rectangular array of numbers called entries...

unitary U. It follows immediately from Choi's theorem that Φ is completely copositive if and only if it is of the form Φ ( A ) = ∑ i V i A T V i ∗ . {\displaystyle...

G. Uchida, Think co(mpletely)positive! Matrix properties, examples and a clustered bibliography on copositive optimization. Journal of Global Optimization...

{H}}_{A})} can be decomposed into a sum of completely positive and completely copositive maps, when dim ( H B ) = 2 {\displaystyle {\textrm {dim}}({\mathcal {H}}_{B})=2}...