<216, [ 20, 15, 16/7, 1, 12/7, 20 ]> r.1 = sqrt(21) P = [ 1 70 70 75] [ 1 3*r.1 + 7 -3*r.1 + 7 -15] [ 1 -2 -2 3] [ 1 -3*r.1 + 7 3*r.1 + 7 -15] Q = [ 1 20 175 20] [ 1 1/7*(6*r.1 + 14) -5 1/7*(-6*r.1 + 14)] [ 1 1/7*(-6*r.1 + 14) -5 1/7*(6*r.1 + 14)] [ 1 -4 7 -4] L = [ [1 0 0 0] [0 1 0 0] [0 0 1 0] [0 0 0 1], [ 0 70 0 0] [ 1 34 20 15] [ 0 20 20 30] [ 0 14 28 28], [ 0 0 70 0] [ 0 20 20 30] [ 1 20 34 15] [ 0 28 14 28], [ 0 0 0 75] [ 0 15 30 30] [ 0 30 15 30] [ 1 28 28 18] ] L* = [ [1 0 0 0] [0 1 0 0] [0 0 1 0] [0 0 0 1], [ 0 20 0 0] [ 1 4 15 0] [ 0 12/7 16 16/7] [ 0 0 20 0], [ 0 0 175 0] [ 0 15 140 20] [ 1 16 142 16] [ 0 20 140 15], [ 0 0 0 20] [ 0 0 20 0] [ 0 16/7 16 12/7] [ 1 0 15 4] ]