thank you all!

I shall correct my question:  more concretely, how to do multiple integrals such as this one:

> int(int( f(x)*exp(I*x*p),p=-fininity..infinity), x=-infinity..infinity);

What I need is not to insert a Dirac(p), which should emerge automatically in the calculation;

nor do I want to use the function inttrans[fourier], since sometimes the integrand is too complicated to be identified as a Fourier integral at first sight.

So the question is :  Is there a way to let maple  identify  int(exp(I*x*p),p=-fininity..infinity) with  Dirac(p)  rather than "undefined" whithin a multiple integral?

thank you for your answer. but to get a Dirac delta is important and useful, as when I do multiple integral Dirac delta will make the integral greatly simplified.  So I really wonder is it feasible.  It can't be replaced by inttrans[fourier] in most of my calculations.


thank you for your answer. but to get a Dirac delta is important and useful, as when I do multiple integral Dirac delta will make the integral greatly simplified.  So I really wonder is it feasible.  It can't be replaced by inttrans[fourier] in most of my calculations.