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Re: Integration bug

  • To: mathgroup at smc.vnet.net
  • Subject: [mg38489] Re: Integration bug
  • From: carlos at colorado.edu (Carlos Felippa)
  • Date: Fri, 20 Dec 2002 04:24:40 -0500 (EST)
  • References: <at4cv9$eta$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

"David W. Cantrell" <DWCantrell at sigmaxi.org> wrote in message news:<at4cv9$eta$1 at smc.vnet.net>...
> 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?)
> 

Shouldn't that be Integrate?

Anyway, here are the results from 4.2:

ClearAll[z,d];   
Print[Integrate[Sin[x+d]/(x+d),{x,-Infinity,Infinity}]  //InputForm];  
Print[Integrate[Sin[x+z]/(x+z),{x,-Infinity,Infinity}]  //InputForm];

0

Pi


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