Matrix completion Uncategorized Jan 22, 2017 P pop Jan 22, 2017 #1 Hello. Is nuclear norm usuable in cvx? M Mark L. Stone Jan 22, 2017 #2 help norm_nuc norm_nuc Nuclear norm of a matrix. norm_nuc(X) = SUM(SVD(X)). X must be a 2-D matrix, real or complex. Disciplined convex programming information: norm_nuc(X) is convex and nonmontonic in X, so X must be affine.