(adsbygoogle = window.adsbygoogle || []).push({}); This is on Mathematica 8 for windows.Code (Text):

Integrate[f[qs] DiracDelta'[qs (1 - 1/x)], {qs, -\[Infinity], \[Infinity]},

Assumptions -> 0 < x < 1]

Integrate[f[qs] DiracDelta'[qs - qs/x], {qs, -\[Infinity], \[Infinity]},

Assumptions -> 0 < x < 1]

The results differ by a sign. They are effective the exact same thing, but due to how I write the insides of the dirac delta I get a different result.

Can anyone replicate this?

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# Mathematica [Mathematica] Bug in Integrate with derivatives of a delta function

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