Covariant gauge
= Covariant gauge
{wiki}
Adding $-(\partial_\mu A^\mu)^2/(2\alpha)$ gives a family of Lorentz-covariant gauges; $\alpha=1$ is <Feynman gauge>.
= Covariant gauge
{wiki}
Adding $-(\partial_\mu A^\mu)^2/(2\alpha)$ gives a family of Lorentz-covariant gauges; $\alpha=1$ is <Feynman gauge>.