#### bug in elliptic integration in Maple 5.1 (2.5.01)

When using Maple V and Maple 6 I am recieving two diﬀerent answers when using the int() function
with a diﬀ() inside of it. The entered lines are exactly the same. A book of mine gives the answer shown
by Maple 6, but I have never recieved any diﬀerent any between the 2 versions when using int() or diﬀ()
before.

Where is the problem, or is it just a special situation?

Maple V:

Maple 6:

Maple 6 is correct here. It’s a bug in previous releases, which has now been corrected. To explore it
further:

Release 5.1 has

But:

This should be 0.

Maple 6 has