- #1
touqra
- 287
- 0
I found this equation in a field theory book, which I can't figure how it was derived:
[tex] \delta(x-a) \delta(x-a) = \delta(0) \delta(x-a)[/tex]
[tex] \delta(x-a) \delta(x-a) = \delta(0) \delta(x-a)[/tex]