Re: Integration of Exp[-x^2]/(1 + Exp[a * x])

*To*: mathgroup at smc.vnet.net*Subject*: [mg39649] Re: [mg39623] Integration of Exp[-x^2]/(1 + Exp[a * x])*From*: Tomas Garza <tgarza01 at prodigy.net.mx>*Date*: Thu, 27 Feb 2003 00:30:12 -0500 (EST)*References*: <200302260743.CAA18986@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Perhaps the simple explanation is that there is no closed form for the indefinite integral. Tomas Garza Mexico City ----- Original Message ----- From: "Stefan" <themailingman at yahoo.de> To: mathgroup at smc.vnet.net Subject: [mg39649] [mg39623] Integration of Exp[-x^2]/(1 + Exp[a * x]) > Hello, > > > > I have to integrate the function Exp[-x^2]/(1 + Exp[a * x]) where a is > real-valued parameter. Unfortunately > > > > Integrate[Exp[-x^2]/(1 + Exp[a * x]), x] > > > > yields no results. Does anyone know a clever trick I might have missed? Any > hint would be welcome, > > > Thanks in advance, Stefan > > > > >

**References**:**Integration of Exp[-x^2]/(1 + Exp[a * x])***From:*"Stefan" <themailingman@yahoo.de>