How to write the cube of demonstration numbers in CVX Uncategorized Sep 13, 2021 D xu Sep 13, 2021 #1 Where, u is a two-dimensional variable, and the rest are constants M Mark L. Stone Sep 13, 2021 #2 pow_pos(norm(u(n)-u(n-1),3))/tau^3 D xu Sep 13, 2021 #3 It worked. Thank you very much