#18396: Handle substitutions of partial sums and products
---------------------------+----------------------------
Reporter: vdelecroix | Owner:
Type: enhancement | Status: new
Priority: major | Milestone: sage-6.7
Component: symbolics | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
---------------------------+----------------------------
Sage is not able to identify partial sum in a substitution
{{{
sage: var('x,y,z')
sage: f = x^4 + x^2 + x
sage: f.subs(x^4 + x^2 == y)
x^4 + x^2 + x
}}}
Similarly with products
{{{
sage: f = x * cos(x) * sin(x)
sage: f.subs( cos(x) * sin(x) == y)
x*cos(x)*sin(x)
}}}
As mentioned in the doc, this is the same behavior as in Maple but differ
from Mathematica. We should be clearer on the semantic of `substitute` and
potentially implement partial sum and product substitutions.
--
Ticket URL: <http://trac.sagemath.org/ticket/18396>
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.
