#18787: Bug with products of symbolic variables with modular integers
-----------------------------+------------------------
Reporter: tmonteil | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.8
Component: symbolics | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
-----------------------------+------------------------
Comment (by rws):
Replying to [comment:6 nbruin]:
> It's not just powers either:
> {{{
> sage: V=[SR.var("x%s"%i) for i in [0..20]]
> sage: F=sum((i+1)*V[i] for i in [0..20])
> sage: G=sum(Zmod(7)(i+1)*V[i] for i in [0..20])
> sage: sage: F*Zmod(7)(1)-G
> -x0 + 0*x13 + 6*x14 + 0*x20 + 3*x3 + 0*x6
> sage: F-G
> 14*x13 + 21*x20 + 7*x6
> }}}
This is different in 0.4.1:
{{{
sage: sage: sage: F*Zmod(7)(1)-G
-x0 + 0*x13 + 0*x20 + 4*x9
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/18787#comment:10>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" 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/sage-trac.
For more options, visit https://groups.google.com/d/optout.
