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MathGroup Archive 2001

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Re: A tough Integral

  • To: mathgroup at
  • Subject: [mg28537] Re: [mg28521] A tough Integral
  • From: Cheng Liu <cliu at>
  • Date: Wed, 25 Apr 2001 19:21:46 -0400 (EDT)
  • References: <>
  • Sender: owner-wri-mathgroup at

Hi, Angela,

	My Macintosh with Mathematica 4.0 gives

\!\(NIntegrate[1/\((Cos[x] + x\^2)\), \ {x, \ 0, \ Infinity}]\)



>Does anyone know how I can get the following Integral to at least 60 places,
>using Mathematica?
>Int(1/(cos(x)+x^2)) between x=0 and x=infinity. Both Integrate and NIntegrate
>seemed helpless.
>bobbym1953 at

Cheng Liu, Ph.D.
MST-8, Structure/Property Relations
Materials Science and Technology Division
Los Alamos National Laboratory
Los Alamos, New Mexico 87545

Phone: 505-665-6892 (office), 505-667-9950 (lab)
Fax:   505-667-8021
email: cliu at

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