第2个回答 2012-06-16
DIRAC Delta function.
DIRAC(X) is zero for all X, except X == 0 where it is infinite.
DIRAC(X) is not a function in the strict sense, but rather a
distribution with int(dirac(x-a)*f(x),-inf,inf) = f(a) and
diff(heaviside(x),x) = dirac(x).本回答被网友采纳