function [Minc]=subMinc(u) Minc=zeros(6,4); Minc(1,1)=-1; Minc(2,2)=-1; Minc(3,3)=-1; Minc(3,1)=1; Minc(4,4)=-1; Minc(4,1)=1; Minc(5,3)=-1; Minc(5,2)=1; Minc(6,4)=-1; Minc(6,2)=1;