polar coordinate singularity

[Sean Dettrick]

Sean Dettrick wrote:

> Hi,
> I am solving Poisson's equation
> Div. Grad(Phi)=rho
> in the (R,Theta) plane with KSP, and it is working well if I avoid the 
> axis.  But I would like to put a point at R=0.   Is there a 
> recommended way to do that?
> Thanks,
> Sean
>
>
By the way I forgot to mention I am using finite differencing, not 
finite elements.
Thanks,
Sean