HI Folks,

I don't do much in the Fourier arena so please forgive the naivete of this question.

I am trying to solve the following 2D Fourier transform (z is a constant):

FourierTransform[1/Sqrt[x^2 + y^2 + z^2], {x, y}, {u, t}]

After some time, Mathematica simply returns the original formula. Similar scenario, if I try to solve the corresponding integral directly:

Integrate[Exp[2 Pi I (m*x + n*y)]/Sqrt[x^2 + y^2 + z^2], {x, 0, 1}, {y, 0, 1}]

Any advice?

Cheers,

Nick