\[
\left( \triangle - \varepsilon_0 \mu_0 \frac{\partial^2}{\partial t^2} \right) \vec{A}
- grad \left( div \, \vec{A} + \varepsilon_0 \mu_0 \frac{\partial \phi}{\partial t} \right) \ =\ - \mu_0 \vec{i} \\
\triangle \phi + div\, \frac{\partial \vec{A}}{\partial t} \ =\ - \frac{\rho}{\varepsilon_0}
\]
\[
\vec{E} \ =\ - grad\, \phi - \frac{\partial \vec{A}}{\partial t} \\
\vec{B} \ =\ rot\, \vec{A}
\]
参考サイト
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