Die Matrix M{\displaystyle {}M} bildet
ab. Wir setzen u1:=e4{\displaystyle {}u_{1}:=e_{4}}, u2:=e1{\displaystyle {}u_{2}:=e_{1}}, u3:=e2{\displaystyle {}u_{3}:=e_{2}}, u4:=e3{\displaystyle {}u_{4}:=e_{3}}.