How to express the constraint in cvx Nonconvex Dec 1, 2021 C shidang li Dec 1, 2021 #1 How to express the constraint xy>=z (x>0,y>0,z>0) in cvx? Thanks. M Michal Adamaszek Dec 1, 2021 #3 Replying to #2 Rotated lorentz would be xy \geq z^2. The question of xy\geq z is nonconvex. M Mark L. Stone Dec 1, 2021 #4 Whoops. I screwed that up, and have deleted my previous post. Bad cone day.