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MathGroup Archive 2002

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NIntegrate

  • To: mathgroup at smc.vnet.net
  • Subject: [mg36508] NIntegrate
  • From: "Rob_jack" <rob_jackNSP at libero.it>
  • Date: Tue, 10 Sep 2002 06:24:36 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Hello!

I've this problem with NIntegrate:
**********************************************
In[1]=f[y_,z_]: = (y^4/( (1+(8.44*10^-4)^2 * (1+z)^2 y^2) (Exp[z]+1) )

In[2]=F[z_]: = NIntegrate[f[y,z], {z, 0, Infinity}
**********************************************

Mathematica 4.0 says:

****************************************************************************
*
NIntegrate: : inum : Integrand 1.07577/( 1+7.12336*10^-7 (1. + z)^2 ) is not
numerical at  {y}={1.}.
****************************************************************************
**

What is it??

Thanks in advance

--
Rob_jack






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