关于电位移矢量■只与自由电荷分布有关的条件

ON ELECTRIC DISPLACEMENT VECTOR ■ DEPENDS ONLY ON THE DISTRIBUTION CONDITIONS OF ELECTRIC FREE CHARGES

本文从静场电中电位移矢量所服从的场方程出发,导出(?)只与自由电荷有关的条件是▽ε×E=(?)。

From the field equations satisfied by the electric displacement vector ■ in electrostatic field, we have derived that ■ depends only on electric free charges on condition that ▽ε×■=0.