[Maxima] Why not replace q with zero?

[Dotan Cohen]

I found this odd:

(%i13) sum(i,i,q,n), simpsum;
Is  q  positive, negative, or zero?

z;
                            2                  2
                           n  + n   q + (q - 1)  - 1
(%o13)                     ------ - ----------------
                             2             2
(%i14)


Why is q part of the equation if it is known to be zero? Why doesn't
Maxima simply output this:

                                     2
                                    n  + n
                                    ------
                                      2


-- 
Dotan Cohen

http://what-is-what.com
http://gibberish.co.il

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