I usually meet the inequality in the optimize constraint,and also have problem like these
Invalid constraint: {real affine} >= {concave},like this,so i want to make sure that what are the acceptable contraint?
{real affine} >= {real affine} and {convex} >= {convex} only?
Now i only know that {concave}>=anything,including affine,convex and concave, and {concave}<=anything is invalid