7.79 bug in integrating abs(..), Maple 6 (21.8.00)

7.79.1 Olivier Klein

I obtain a bad answer when I type the following integral:

> restart; assume(T>0); int(2*Pi/T*abs(sin(2*Pi/T*t)),t=0..T); 
                      2
 

(it is wrong, the answer should be 4)

It is not clear with me where the mistake is?

It is corrected with Maple 7. (U. Klein)