#5201: make solve understand matrix equations
---------------------------+------------------------------------------------
Reporter: jason | Owner: burcin
Type: enhancement | Status: new
Priority: major | Milestone: sage-4.7
Component: calculus | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Changes (by jason):
* keywords: beginner =>
Comment:
You bring up a good point, and make me doubt whether the feature request
is even feasible. Certainly it's probably not a beginner ticket after
all. The problem is that we already have an == operator:
{{{
sage: a=matrix(SR,2,[x,x^2,x+1,x+4])
sage: b=matrix(SR,2,[4,3,2,1])
sage: a==b
False
}}}
That means that all solve will see is False. Instead, we want something
like:
{{{
sage: SR(a)==SR(b)
([ x x^2]
[x + 1 x + 4]) == ([4 3]
[2 1])
}}}
(i.e., we want the == in the solve to construct an equation, which it does
for symbolic objects. One of the issues at heart here is that a symbolic
object wrapping a Sage matrix is different from a Sage matrix containing
symbolic objects.
So I'm going to take off beginner status for this ticket here. It would
still be nice if solve(SR(a)==SR(b)) worked in the above example.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5201#comment:5>
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