Yes, it seems that this particular special value was just missed in the definition.
There are tons of special functions, and each one has tons of special values and identities, so it's quite easy for us to miss some when implementing them. Pull requests welcome. Should be an easy fix; just add a line to eval and add a test. Aaron Meurer On Tue, Dec 3, 2013 at 3:00 PM, Xaver <[email protected]> wrote: > > > Am Dienstag, 3. Dezember 2013 22:24:06 UTC+1 schrieb rl: >> >> > Out[2]: lowergamma(y, 0) >> > Why not 0? >> >> If Sympy implements a function, >> this does not imply it knows every >> detail about that function or >> can use it in any context. > > > Ok. > Anyway, if one looks at the code through via lowergamma??, > then there is quite a lot of detail implemented already for > lowergamma(y,0) still not to know it is 0. > > -- > You received this message because you are subscribed to the Google Groups > "sympy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/sympy. > For more options, visit https://groups.google.com/groups/opt_out. -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sympy. For more options, visit https://groups.google.com/groups/opt_out.
