Comment #23 on issue 3128 by [email protected]: Sum and Product
manipulations
http://code.google.com/p/sympy/issues/detail?id=3128
1. I think summations with reversed limits is a bit of a corner case anyway
for such an audience.
2. Why not?
3. Not using the Karr convention is what leads to ambiguity, because there
is no way to be consistent otherwise, especially with symbolic limits.
I agree that we should have an object that represents summing positive
values over a set (or any values over an ordered set--be sure to make this
distinction; it matters!). It probably should be a separate object, SumSet
or something.
--
You received this message because this project is configured to send all
issue notifications to this address.
You may adjust your notification preferences at:
https://code.google.com/hosting/settings
--
You received this message because you are subscribed to the Google Groups
"sympy-issues" 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-issues.
For more options, visit https://groups.google.com/groups/opt_out.
