[Solved (fix in progress)] double integration of sqrt(x+y) for x and y fails

[Stefan]

Hi Parisse, this is good news. Thanks for that.
If I am right then you are the main developer of Xcas. May I ask how your relation to HP is? As far as I understood you are not employed by HP, but by University of Grenoble. However Xcas still seems to be deeply connected to HP calculators. The Xcas website does not go into much detail on that topic. It's just pure curiosity.
And since Xcas is used in the Prime and the License is GPLv3. What does this mean for the rest of the Prime's software? Does HP use a different license? I vaguely remember that GPLv3 demands that software which links against GPLv3 licensed software needs to be open sourced as well. I was thinking about whether this might have been a reason why the Prime's CAS is somewhat separated from the rest.

Thanks again