# CCL:G: analytic Coulomb and Exchange integrals for 2-dimensional Gaussian
functions confined to a plane

*From*: "uekstrom.:.gmail.com"
<uekstrom.:.gmail.com>
*Subject*: CCL:G: analytic Coulomb and Exchange integrals for
2-dimensional Gaussian functions confined to a plane
*Date*: Wed, 2 Sep 2015 08:54:13 +0200

Sent to CCL by: "uekstrom=-=gmail.com" [uekstrom=-=gmail.com]
If you want the 1/r form you can take the expressions for anisotropic
gaussian integrals and take the planar limit, but I am not sure that
you will end up with a closed expression, there might be one integral
that you have to approximate. The log r integrals can be easily
computed by a 2d fft.
Regards,
Ulf