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jf
04/23/13 11:09am

Mysteries of the universe?

Probably a side effect of internal processing. I doubt that Integrate goes out of its way to add a -1.

The result is correct.

In[2]:= Integrate[DiracDelta[x - 1/2], x]
Out[2]= -1 + HeavisideTheta[-1 + 2 x]
..
In[6]:= D[ -1 + HeavisideTheta[-1 + 2 x], x]
Out[6]= 2 DiracDelta[-1 + 2 x]

In[9]:= Integrate[ x * DiracDelta[x - 1/2], {x,0,3}]
Out[9]= 1/2

In[10]:= Integrate[ x * 2 DiracDelta[-1 + 2 x], {x,0,3}]
Out[10]= 1/2







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Subject (listing for 'Integrating DiracDelta')
Author Date Posted
Integrating DiracDelta Kameron 04/22/13 10:14pm
Re: Integrating DiracDelta jf 04/23/13 11:09am
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