The constraint you showed is not convex, so CVX rejected it. Even when it is convex, it needs to be written down in DCP rule so that CVX can accept it. See Why isn't CVX accepting my model? READ THIS FIRST!
The constraint you showed is not convex, so CVX rejected it. Even when it is convex, it needs to be written down in DCP rule so that CVX can accept it. See Why isn't CVX accepting my model? READ THIS FIRST!