Can CVX recognize the cubic of 2-norm like following?

Is it available write {\left\| {\rm{v}} \right\|^3} like following in cvx:


where \rm{v} is vector.

pow_pos(norm(v),3) works in CVX2.1 or CVX 3.0beta

norm(v)^3 works in CVX3.0beta (due to newly added sign aware convexity analysis capability), but is not accepted by CVX2.1

I got you. Thanks very much, Mark!