#13286: inconsistent behaviour of solve
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Reporter: chapoton | Owner: burcin
Type: defect | Status: new
Priority: minor | Milestone: sage-5.3
Component: symbolics | Keywords: solve, symbolic
Work issues: | Report Upstream: N/A
Reviewers: | Authors:
Merged in: | Dependencies:
Stopgaps: |
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I have found the following :
{{{
sage: w,z=var('w','z')
sage: solve([z-4,w-3],[z,w])
[[z == 4, w == 3]]
sage: solve([z-4],z)
[z == 4]
sage: solve([z-4,z-2],z)
[]
sage: solve([z-4,z-2],[z])
[]
sage: solve([z-4],[z])
TypeError: [z] is not a valid variable.
}}}
The last line is a really *'''bad'''* behaviour ! It forces to distinguish
the case when there is only one equation and one variable. Compare also
with the first solve.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13286>
Sage <http://www.sagemath.org>
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