On 18 lis, 21:49, Harald Schilly <harald.schi...@gmail.com> wrote:
> I got this from the "report a problem" form, confirmed in 4.2.1
>
> sage: solve([x==x],x)
> gives an exception.
>
> Maxima says this:
> $ maxima -q
> (%i1) solve([x=x],x);
> (%o1) all
> (%i2)
Similar problem is
solve(SR(0),x)
and another problem is
solve(0,x)
- but both these cases are highly improbable. Should be the second one
fixed or no?
I think that it is easy to catch the answer 'all' in the maxima output
and change into anything we want on output, but the question is, what
should be the output of solve([x==x],x) and solve([x==x],x,
solution_dict=True) in Sage
btw:
sage: y=var('y')
sage: solve([x==x,y==y],[x,y])
[[x == r2, y == r1]]
sage:
I did not look to the Maxima code (can look tomorow, we have a
midnight in five minutes), but from the test like above it seems that
the answer 'all' appears only for equations in one variable.
Robert
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