Hi, I'm new to Maple and I'm trying to use it in some frequency domain convolutions analysis. At the moment, I'm just tying to organize my work and for this I need to perform some simple variable changes on multiple integrals.
I've started like this:
> conv:= (x,h,t,tau) -> unapply(int(x(tau)*h(t-tau),tau),t);
Now, what I really wanted to do is something like this:
The result looks like the way I'm expecting. However, I've tried to do this:
and tried to do two simple change of variables, just to see if everything was ok:
but got this error:
Error, (in IntegrationTools:-Change) invalid input: rhs received sigma2, which is not valid for its 1st argument, expr
I've looked at the Maple Help and the internet, but wasn't very sucessful. Anyone could give me a hand?