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MathGroup Archive 2007

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Re: Numerical integration

  • To: mathgroup at smc.vnet.net
  • Subject: [mg79645] Re: Numerical integration
  • From: chuck009 <dmilioto at comcast.com>
  • Date: Wed, 1 Aug 2007 04:56:28 -0400 (EDT)

Personally, I would suspect the symbolic result as well unless you know from independent means that the results returned by Integrate is indeed the correct result.  This I say in regards to another similar situation with:

Log[1+1/(e^x Sqrt[x])]

which returns an incorrect result symbolically.  When I use the Method->Oscillatory I get:

In[24]:=
NIntegrate[f[x],{x,0,Infinity},Method->Oscillatory,WorkingPrecision\[Rule]20]

Out[24]=
0.871


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