Formula_5972

\[\begin{gathered}N_{i}=\left(I_{i}+i K_{i}\right) / 2, N_{i}^{+}=\left(I_{i}-i K_{i}\right) / 2, \\I_{i}=\varepsilon_{i j k} M^{j k} / 2, K_{i}=M_{0 i},\end{gathered}\]