[公式]

$$\begin{eqnarray*} z\times\overline{z}&=&\vert z\vert^2\\ \mbox{Re}{z}&=& \fra... ...z+\overline{z})\\ \mbox{Im}{z}&=& \frac{1}{2j}(z-\overline{z}) \end{eqnarray*}$$