> Le 05/02/2011 20:08, Francois Bissey a écrit : > > > Le 05/02/2011 11:44, Francois Bissey a écrit : > > > > So gamma could be called from C, Cython, possibly mpmath, pynac or > > > > maxima. I guess you could tests the results calling from mpmath or > > > > maxima. I am guessing that SR(10.0r).gamma() will end up being a > > > > call to > > > > > > maxima to compute gamma but I could be completely off track. But > > > > since it is also a gamma computation it could be related to the > > > > previous computation of gamma(6). > > > > > > Look at the last comments in the bug : I'm supposed to have tracked > > > what was called exactly... but it turns out it leads to a > > > correct-functioning function :-( > > > > You asked if you missed something in the ticket. My suggestion is to try > > the various gamma to see if one matches the results you get. > > If so you may have missed something in the chain. It's a kind of reverse > > thinking. > > Uh... that looks like a brute-force attack to the problem, which > although guaranteed to work, is definitely inefficient. > > Isn't sage deterministic? It must be possible to know exactly what is > called when a command is typed! > I like brute force :) Anyway deterministic doesn't necessarily means predictable but I don't feel we should expand into chaos theory here.
I am with Dima on the fact that it represent the same number. As to why you have a different answer when you execute Volker's test, a possibility that occurs to me is that because sage's test is about a float could sage's answer be cast back to a float before being displayed? I notice an earlier test in function/other.py is about gamma1(6) as an integer and an integer is expected in return. Symbolic input return symbolic output so a float as input should return a float. Francois This email may be confidential and subject to legal privilege, it may not reflect the views of the University of Canterbury, and it is not guaranteed to be virus free. If you are not an intended recipient, please notify the sender immediately and erase all copies of the message and any attachments. Please refer to http://www.canterbury.ac.nz/emaildisclaimer for more information. -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
