Radial-spherical coordinates. Steady 1-D Radial.

The Laplace Equation for steady 1-D Green's Function in the radial-spherical coordinate system is:

$${\frac{1}{r^{2}}}$$$${\frac{d}{dr}}$$$$\left(\vphantom{ r^{2}\frac{dG}{dr}}\right.$$r²$${\frac{dG}{dr}}$$ $$\left.\vphantom{ r^{2}\frac{dG}{dr}}\right)$$ = - $$\delta$$(r - r^$\prime$)