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Re: DiracDelta Function question

  • To: mathgroup at
  • Subject: [mg21104] Re: [mg21082] DiracDelta Function question
  • From: BobHanlon at
  • Date: Fri, 17 Dec 1999 01:21:04 -0500 (EST)
  • Sender: owner-wri-mathgroup at

I get the same results on a Mac with version 4. 

Further, this is just an instance of a more general problem:

Integrate[DiracDelta[a x + b], {x, -Infinity, +Infinity}]


Bob Hanlon

In a message dated 12/13/1999 1:21:22 AM, acz43 at writes:

>Why is mathematica unable to evaluate:
>Integrate[DiracDelta[2 x - 1], {x, -Infinity, +Infinity}]
>Also interestingly:
>Integrate[DiracDelta[2 x - 2], {x, -Infinity, +Infinity}]
>returns (1/2)
>I should have thought that the answer in both cases would be 1.
>I am using Mathematica v4.0 on MS Windows 95.

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