[Getdp] Need some help

[matthieu.guillon]

Dear Christophe,

	I am a new user of GetDP, and I need to compute the propagation of an 
acoustic wave inside a horn (with a non constant cross section along the 
propagation axis).
	The equation looks like this:

		d²P     dP       d(ln(S))
		-----  - -----  *   -----------    + k²*P = f
		dx²     dx         dx

	With mixed Derichlet and Neumann boundary conditions (Robin BC).

Please could you show me how can I write this in the right procedure ?

Thank's a lot for your help


Matthieu GUILLON

C.C.B.