Formula_25294

\[\left.\begin{array}{c}\left(\gamma^{\mu} p_{\mu}-m\right) u_{\lambda}(p)=0, \\\left(\gamma^{\mu} p_{\mu}+m\right) u_{\lambda}(-p)=0, \\\left(\gamma^{\mu} p_{\mu}=\gamma^{0} p^{0}-\gamma^{\alpha} p^{\alpha}, \alpha=1,2,3\right) .\end{array}\right\}\]