Integrals and singularities

[parisse]

The hp50g has a much better error handling system than the Prime. You can throw the equivalent of a c++ exception everywhere in the hp50g code. This made coding much safer, I really miss this functionnality and that explains why sometimes you can't interrupt a computation or it eventually crashes.
It does not mean the 50g is bugfree, there are CAS bugs there, but you will probably never hit them because you won't have the patience to wait. On the other hand, the Prime is constantly improving, at some point in the near future it will be as reliable as the ancient code of the 48g series, but able to solve much more.