Cvx is giving error when i use this inequality constraint,why?

Nonconvex
Jan 30, 2020
D
#1

Capture

M
#2

norm(x)>=constant is not a convex constraint. The fact that your constraint is trivial because constant=0 is a coincidence.

1 1 reply
D
#3
Replying to #2

i thought all norms are convex

M
#4

convex_expression <= constraint is a convex constraint. convex_expression >= 0 is non-convex.

Also, norm(affine_expression) is convex, but norm(non_affine_expression) is not necessarily.

Please read http://cvxr.com/cvx/doc/basics.html#constraints and if you have the energy, read and work exercises in https://web.stanford.edu/~boyd/cvxbook/