#7325: Sage cannot solve inequalities
----------------------------+-----------------------------------------------
Reporter: robert.marik | Owner: tbd
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-4.3
Component: algebra | Keywords: relation, symbolics, inequality,
solve
Work_issues: | Author: Robert Marik
Upstream: N/A | Reviewer: Karl-Dieter Crisman
Merged: |
----------------------------+-----------------------------------------------
Changes (by mvngu):
* status: positive_review => needs_work
Comment:
With the new Maxima spkg and the patch `trac_7325-final.patch`, I got
these failures:
{{{
[mv...@sage sage-4.3.alpha0-maxima]$ ./sage -t -long devel/sage-
main/sage/symbolic/relation.py
sage -t -long "devel/sage-main/sage/symbolic/relation.py"
**********************************************************************
File "/scratch/mvngu/sandbox/sage-4.3.alpha0-maxima/devel/sage-
main/sage/symbolic/relation.py", line 152:
sage: solve_ineq([log(x)>log(y)])
Expected:
[y < x, 0 < y]
Got:
[0 < y, y < x, 0 < x]
**********************************************************************
File "/scratch/mvngu/sandbox/sage-4.3.alpha0-maxima/devel/sage-
main/sage/symbolic/relation.py", line 909:
sage: solve_ineq_fourier([x+y<9,x-y>4])
Expected:
[y + 4 < x, x < -y + 9, y < (5/2)]
Got:
[y < min(x - 4, -x + 9)]
**********************************************************************
File "/scratch/mvngu/sandbox/sage-4.3.alpha0-maxima/devel/sage-
main/sage/symbolic/relation.py", line 918:
sage: solve_ineq_fourier([log(x)>log(y)])
Expected:
[y < x, 0 < y]
Got:
[0 < y, y < x, 0 < x]
**********************************************************************
File "/scratch/mvngu/sandbox/sage-4.3.alpha0-maxima/devel/sage-
main/sage/symbolic/relation.py", line 999:
sage: solve_ineq([x+y<9,x-y>3])
Expected:
[y + 3 < x, x < -y + 9, y < 3]
Got:
[y < min(x - 3, -x + 9)]
**********************************************************************
3 items had failures:
1 of 117 in __main__.example_0
2 of 8 in __main__.example_7
1 of 8 in __main__.example_8
***Test Failed*** 4 failures.
For whitespace errors, see the file
/home/mvngu/.sage//tmp/.doctest_relation.py
[6.9 s]
exit code: 1024
----------------------------------------------------------------------
The following tests failed:
sage -t -long "devel/sage-main/sage/symbolic/relation.py"
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7325#comment:9>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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