List questions from copositivity | MathQA

Whether the set of a symmetric copositive matrices $x^T A x \geq 0$ for $\forall x \in \mathbb{R}^n$ $x \geq 0$ is convex?

Published on 27 Mar 2019 - 10:58

Lagrange multiplier for more than one constraints.

Published on 29 Sep 2014 - 6:26

On copositive matrix criteria

Published on 29 Jul 2020 - 16:50

Example of a matrix which is copositive plus but not PSD.

Published on 10 Apr 2015 - 2:42

"Positive definite" matrix for component-wise positive vector

Published on 18 May 2017 - 3:46

Does the cone of copositive matrices include the cone of positive semidefinite matrices?

Published on 05 Jan 2018 - 10:23

Finding dual cone for a set of copositive matrices

Published on 25 Mar 2026 - 11:19

Example of copositive matrix but neither positive semidefinite nor elementwise nonnegative?

Published on 04 Oct 2021 - 15:04