MathGroup Archive 1999

[Date Index] [Thread Index] [Author Index]

Search the Archive

RE: DiracDelta Function question

  • To: mathgroup at
  • Subject: [mg21129] RE: [mg21082] DiracDelta Function question
  • From: "Ersek, Ted R" <ErsekTR at>
  • Date: Fri, 17 Dec 1999 01:21:29 -0500 (EST)
  • Sender: owner-wri-mathgroup at

Julian Francis wrote:
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
I am using Mathematica v4.0 on MS Windows 95.

It's obviously a bug. However, Mathematica 4.0 gets the next one right.

Integrate[DiracDelta[2x - 1], {x, -10^6, 10^6}]


Ted Ersek

For Mathematica tips, tricks see

  • Prev by Date: Re: Help! How to execute line integral, surface integral or integration around contour.
  • Next by Date: Re: DiracDelta Function question
  • Previous by thread: Re: DiracDelta Function question
  • Next by thread: Re: DiracDelta Function question