- #1
ognik
- 643
- 2
Not following this example (PDE for Greens function) in my book:
Book states:
I recognised this as the Hemlmholtz eqtn, but cannot find where the 3rd term comes from? It looks like it could be the 3D Fourier Transform representation of the dirac-delta function? (if so a link to, or a derivation would be nice)
Then they say they solve the PDE in terms of a Fourier Integral
I know the Fourier Integral in 3D is , (sqrt in denominator?) so I'm not sure what they are doing here?
Book states:
I recognised this as the Hemlmholtz eqtn, but cannot find where the 3rd term comes from? It looks like it could be the 3D Fourier Transform representation of the dirac-delta function? (if so a link to, or a derivation would be nice)
Then they say they solve the PDE in terms of a Fourier Integral
I know the Fourier Integral in 3D is