trouble integrating Bessel Functions

*To*: mathgroup at smc.vnet.net*Subject*: [mg6484] trouble integrating Bessel Functions*From*: Chris Pankratz <pankratz at eta.pha.jhu.edu>*Date*: Mon, 24 Mar 1997 21:38:31 -0500 (EST)*Organization*: HCF - Johns Hopkins University, Baltimore, Maryland, USA*Sender*: owner-wri-mathgroup at wolfram.com

I have encountered a curious problem calculating the fourier transform of a modified bessel function. Mathematica 2.2 will calculate it just fine, but Mathematica 3.0 won't. Can anyone assist? Thanks. Chris Mathematica 2.2 does it just fine: ---------------------------------- (1/Sqrt[2 Pi]) * Integrate[BesselK[0, t] Exp[I w t], {t, -Infinity, Infinity}] Pi Sqrt[--] 2 ------------ 2 Sqrt[1 + w ] Mathematica 3.0 doesn't seem to have the right integration package loaded ------------------------------------------------------------------------- - it just echoes the command back to me, without giving a result.