Bessel's equation

[Alastor123]

Hi,

I need help in the development of the soluccion of the differential equations when exist point of indeterminations, like in cylindrical and spheres coordinates in the center of the model, r:=0.

I need a help in how resolve the problem, but step by step, using the Bessel's equation.


thanks.

[defunc]

You will have to use a bessel function of the second kind if theres a singularity at r=0.