#16753: solve of equation system misses trivial simplifications
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Reporter: rws | Owner:
Type: defect | Status: new
Priority: critical | Milestone: sage-6.3
Component: calculus | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Changes (by rws):
* priority: major => critical
Old description:
> (please write a better title)
>
> Some trivial substitutions are not done by solve:
> {{{
> sage: x,y=var('x,y')
> sage: solve([y==exp(x),2*y-exp(x)==1],x,y)
> [y == e^x, 2*y - e^x == 1]
> }}}
> and, as reported in http://ask.sagemath.org/question/23652/solve-
> equations-with-sinx/
> {{{
> sage: solve([y==sin(x),y+4*sin(x)==5],x,y)
> [y == sin(x), y + 4*sin(x) == 5]
> }}}
New description:
Some trivial substitutions are not done by solve:
{{{
sage: x,y=var('x,y')
sage: solve([y==exp(x),2*y-exp(x)==1],x,y)
[y == e^x, 2*y - e^x == 1]
}}}
and, as reported in http://ask.sagemath.org/question/23652/solve-
equations-with-sinx/
{{{
sage: solve([y==sin(x),y+4*sin(x)==5],x,y)
[y == sin(x), y + 4*sin(x) == 5]
}}}
--
Comment:
Set to critical because it makes Sage look really stupid.
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Ticket URL: <http://trac.sagemath.org/ticket/16753#comment:1>
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