1. The problem statement, all variables and given/known data How do you show that int[delta(t)]dt from negative infinity to infinity is 1? 2. Relevant equations Dirac delta function defined as infinity if t = 0, 0 otherwise 3. The attempt at a solution My teacher said that it has to do with m->infinity for the following function f_m(t) = m*exp(-(mt)^2)/sqrt(pi) I don't understand - what is this function exactly and how does the delta function property follow?