Defining Real expressions

*To*: mathgroup at smc.vnet.net*Subject*: [mg8494] Defining Real expressions*From*: Marco Beleggia <beleggia at gpxbof.df.unibo.it>*Date*: Tue, 2 Sep 1997 16:15:38 -0400*Organization*: universita' di Bologna*Sender*: owner-wri-mathgroup at wolfram.com

I must evaluate an Integral in which I'd like to assign real values to some parameters, but I don't know how to do that. For example, in the following integral (a Fourier Transform): f[x_,p_]=Integrate[y/(x^2+y^2) Exp[-I p y],{y,-Infinity,Infinity}], p should be a real parameter. The output given by Mathematica is conditioned to Im[p]==0, such as If[Im[p]==0,....,....], which is not easy to handle, and I'd like to avoid this complication. Is it possible ? Thanks -- Marco Beleggia