MathGroup Archive 1999

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

Search the Archive

Limit Problem

  • To: mathgroup at
  • Subject: [mg17199] Limit Problem
  • From: "Arturas Acus" <acus at>
  • Date: Mon, 26 Apr 1999 01:20:41 -0400
  • Sender: owner-wri-mathgroup at


I was unable to get the rezult of the following 
simple example (looks like an infinite loop)

 << Calculus`Limit`

Limit[Integrate[q^2*r^2*(Cos[q*r] - Sin[q*r]/(q*r)), r],r -> Infinity]]

Another question is the similar integral 

Integrate[r^2*(Cos[q*r] - Sin[q*r]/(q*r)), {r, 
Mathematica gives zero here, but we were expecting 
something proportional to DiracDelta here. 
Dr. Arturas Acus
Institute of Theoretical
Physics and Astronomy
Gostauto 12, 2600,Vilnius

E-mail: acus at
   Fax: 370-2-225361
   Tel: 370-2-612906

  • Prev by Date: Re: I can't exit Windows98 after Mathematica sessions: why?
  • Next by Date: Mathematica in Chemistry
  • Previous by thread: using WorkingPrecision and AccuracyGoal to control the error of estim.
  • Next by thread: Mathematica in Chemistry