John Lapeyre wrote:
> Its not a question of CAS design. There is no need to go
> into the details of how Maxima computes the answer (although
> that may be interesting). Maxima is giving the only correct
> answer. The user is saying:
>
> For positive integers m and n what is the definite integral
> integral_sign cos(m*x)*cos(n*x) dx from 0 to 2 pi ?
>
> The answer to that question is
> 0 for m != n
> and the integral is undefined for m=n.
Why is it undefined for m=n? It seems well-defined to me.
Ray