The potential equation had figured in the eighteenth-century work on gravitation. 位勢方程在十八世紀關(guān)于引力的研究中已顯露頭角。
It leads to one simple equation, which, in the isotropic case, is the bipotential equation. 因為它可以推出一個(gè)簡(jiǎn)單的方程,在各向同性的情況下,這個(gè)簡(jiǎn)單方程是一個(gè)雙位勢方程。