Integrating over a delta function

[raisin_raisin]

Hello,
I have just integrated over one variable, x and have now got a delta function
\delta(m)

where m = constant * (s-s')

now I have to integrate over either s or s' but I am a bit confused
since if I integrate over say s then the delta function depends on s.

Hope I have explained clearly enough, thanks for reading.

 

[clamtrox]

\int ds \delta(s-s') f(s) = f(s').


Notice too that there is no constant there, so you have to get rid of it first.

 

[raisin_raisin]

\int ds \delta(s-s') f(s) = f(s').


Notice too that there is no constant there, so you have to get rid of it first.

Thank you very much.