Think you’ve mastered quadratic equations? Think again! This insanely tricky problem will put your algebra skills to the ultimate test. Can you solve it? #MathChallenge #QuadraticEquation #BrainTeaser ...

For each branch/line, the BFM contains a nonconvex quadratic equality. A mathematical formulation of its convex hull is proposed, which is the tightest convex relaxation of this quadratic equation.

The optimal linear quadratic controller is usually designed based on a Riccati equation. However, when the Riccati is irregular, the problem becomes much more difficult since it is not clear what ...