6次元
B = B 12 e 12 + B 13 e 13 + B 14 e 14 + B 23 e 23 + B 24 e 24 + B 34 e 34 {\displaystyle \mathbf {B} =B_{12}\mathbf {e} _{12}+B_{13}\mathbf {e} _{13}+B_{14}\mathbf {e} _{14}+B_{23}\mathbf {e} _{23}+B_{24}\mathbf {e} _{24}+B_{34}\mathbf {e} _{34}}