Comment #7 on issue 1878 by asmeurer: For non-commutative symbols all
comparisons evaluate to False
http://code.google.com/p/sympy/issues/detail?id=1878
But once you say a > b, that implies that a - b > 0, or in other words, a -
b is "positive", at least in the sence
that it is in a positive subring. In that case, elements of the inverse
subring are usually called negative. See
http://en.wikipedia.org/wiki/Partially-ordered_ring.
So I guess it depends on what is meant by .is_negative. If that assumption
implies is_real, then of course we
don't want it here. But I think assuming negativity is key for
inequalities, so maybe it should be separate
somehow.
--
You received this message because you are listed in the owner
or CC fields of this issue, or because you starred this issue.
You may adjust your issue notification preferences at:
http://code.google.com/hosting/settings
--
You received this message because you are subscribed to the Google Groups
"sympy-issues" group.
To post to this group, send email to sympy-iss...@googlegroups.com.
To unsubscribe from this group, send email to
sympy-issues+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/sympy-issues?hl=en.
