稳定分布{\displaystyle \Phi =\tan(\pi \alpha /2)\,} 当 α = 1 {\displaystyle \alpha =1} 时 Φ = − ( 2 / π ) log | t | . {\displaystyle \Phi =-(2/\pi )\log |t|.\,} μ {\displaystyle
电磁四维势{\displaystyle A_{\alpha }=\left({\frac {\phi }{c}},-{\vec {A}}\right)\qquad \left(A_{\alpha }=(\phi ,-{\vec {A}})\right)} 其中 ϕ {\displaystyle \phi \,} 是电势, A