Lindsey J. Heagy,Doulas W. Oldenburg∇⋅j⃗=I(δ(r⃗−r⃗s+)−δ(r⃗−r⃗s−))e⃗=−∇ϕ\begin{split} \nabla \cdot \vec{j} &= I\left(\delta(\vec{r} - \vec{r}_{s^{+}}) - \delta(\vec{r} - \vec{r}_{s^{-}})\right) \\ \vec{e} &= - \nabla \phi \end{split}∇⋅je=I(δ(r−rs+)−δ(r−rs−))=−∇ϕ(1)PreviousconstitutiverelationsNextdiscretedccc
