Dirac (delta) function

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  • #1
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Where can i find the proof of dirac's function properties?
 

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  • #2
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The delta "function" isn't an ordinary function; it's a distribution, and it only makes sense when you integrate it. It's *defined* by the property
[tex]\int_{-\infty}^\infty \delta(x) f(x) \;dx = f(0)[/tex]
for suitable test functions [itex]f[/itex].
 
  • #3
HallsofIvy
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In other words, the delta function is the operator that maps f(x) to f(0).

This doesn't belong in this area. I am moving it to "Calculus and Analysis"
 
  • #4
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Where can i find the proof of dirac's function properties?
Look for a textbook that sounds like "Distribution theory" and you'll find what you need.
 
  • #5
arildno
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  • #6
HallsofIvy
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arilno, that link is invalid.
 
  • #7
arildno
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I've fixed it now.
 

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