LIB "modules.lib";
ring r;
matrix m[2][2]=x,y2,z,xz;
matrix n[2][2]=1,2,3,4;
Matrix M = m;
Matrix N = n;
tensorMatrix(M,N);
==>      {1}  {1}   {2}   {2}
==> {0}    x   2x    y2   2y2
==> {0}   3x   4x   3y2   4y2
==> {0}    z   2z    xz   2xz
==> {0}   3z   4z   3xz   4xz
==>