== Methods Of Electrostatics, Magnetostatics & Quasi-Statics ==
In EM.Ferma, we solve solves the Laplace Poisson equation (shown below) for the electric scalar potential subject to specified sources and boundary conditions.:
<math>\Delta\varphi(\mathbf{r}) = \nabla^2 \varphi(\mathbf{r}) = -\frac{\varrho(\mathbf{r})}{\varepsilon_0}</math>
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where Φ(<b>r</b>) is the electric scalar potential and ρ(<b>r</b>) is the volume charge density.
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In a source-free region, ρ(<b>r</b>) = 0, and Poisson's equation reduces to the Laplace equation:
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<math>\Delta\varphi(\mathbf{r}) = \nabla^2 \varphi(\mathbf{r}) = 0</math>