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MathGroup Archive 2012

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Re: Integrating DiracDelta in Mathematica: how to suppress ConditionalExpression

  • To: mathgroup at smc.vnet.net
  • Subject: [mg128340] Re: Integrating DiracDelta in Mathematica: how to suppress ConditionalExpression
  • From: Helen Read <readhpr at gmail.com>
  • Date: Mon, 8 Oct 2012 02:31:24 -0400 (EDT)
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Integrate[DiracDelta[p - q2], {p, -Infinity, Infinity},
  Assumptions -> {q2 \[Element] Reals}]

Helen Read
University of Vermont


On 10/7/2012 1:33 AM, Yaj wrote:
> For the integral shown below, how do I get Mathematica to output
> only  the "correct" answer as 1 (for future steps in the notebook) and i.e.
> have Mathematica NOT OUTPUT the ConditionalExpresssion that q2 is real etc?
>
> In[5]:= Integrate[DiracDelta[p - q2], {p, -Infinity, Infinity}]
>
> Out[5]:= ConditionalExpression[1, q2 \[Element] Reals]
>






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