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Integration bug

  • To: mathgroup at smc.vnet.net
  • Subject: [mg38265] Integration bug
  • From: "David W. Cantrell" <DWCantrell at sigmaxi.org>
  • Date: Tue, 10 Dec 2002 04:11:02 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

Using version 4.1,

Integral[Sin[x+d]/(x+d),{x,-Infinity,Infinity}] yields 0 .

This is, of course, incorrect. (Does version 4.2 make this error also?)

Mathematica does Integral[Sin[x]/x,{x,-Infinity,Infinity}] correctly
however, yielding Pi, which should also be the answer for the original
integral (regardless of the value of d).

Does anyone have an idea why Mathematica gets the original integral wrong?

David Cantrell

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