Re: Integrating DiracDelta in Mathematica: how to suppress ConditionalExpression
- To: mathgroup at smc.vnet.net
- Subject: [mg128333] Re: Integrating DiracDelta in Mathematica: how to suppress ConditionalExpression
- From: "Nasser M. Abbasi" <nma at 12000.org>
- Date: Mon, 8 Oct 2012 02:29:03 -0400 (EDT)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
- Delivered-to: l-mathgroup@wolfram.com
- Delivered-to: mathgroup-newout@smc.vnet.net
- Delivered-to: mathgroup-newsend@smc.vnet.net
- References: <k4r46n$nnt$1@smc.vnet.net>
- Reply-to: nma at 12000.org
On 10/7/2012 12:33 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]
>
In[253]:= Assuming[Element[q2,Reals],Integrate[DiracDelta[p-q2],{p,-Infinity,Infinity}]]
Out[253]= 1
--Nasser