Re: [PyGiNaC-users] strange behavior with the test suite

[<pp...@fy...>]

Hi, 

> I think that this is a canonicalization issue.  If hash(x) is greater
> than hash(y) (when reinterpret_cast'ed back to unsigned ints), then
> pow(x - y, 2) normalizes to pow(y - x, 2)
> 
> I'm not sure if this behavior is deliberate so I'm bringing it up on
> ginac-list.  In the meantime, a patch has been committed to CVS that
> works around the error.

I'm afraid there is something wrong in the workaround. I did a cvs update 
getting your changes (bin/exam_normalization.py and ChangeLog) and rerun 
the test (again several times since it does not fail every time), and I 
still get the error sometimes. 

Are you still able to reproduce the error or is it just me? 

Regards,
Matti

-- 
Matti Peltomaki, Graduate Student
Laboratory of Physics 
Helsinki University of Technology
040 7576977, room Y308B