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https://issues.apache.org/jira/browse/MATH-819?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13411866#comment-13411866
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Thomas Neidhart commented on MATH-819:
--------------------------------------
Hi Raghu,
thanks for the report and the test case. There seems to be a bug in case the
solver is not restricted to negative values. So when you call it the following
way you get correct results:
{noformat}
PointValuePair solution = new SimplexSolver().optimize(f, constraints,
GoalType.MAXIMIZE, true);
{noformat}
I will dig further into it, and solve it asap.
Thomas
> SimplexSolver - InfeasibleSolution when feasible
> ------------------------------------------------
>
> Key: MATH-819
> URL: https://issues.apache.org/jira/browse/MATH-819
> Project: Commons Math
> Issue Type: Bug
> Affects Versions: 3.1
> Environment: Windows 7, JDK 1.7.0_03
> Reporter: Raghu Rangarajan
> Attachments: CommonsSolver2.java
>
>
> I am seeing an odd behavior with the latest code in the main trunk (Directory
> revision: 1358535). The solver throws "NoFeasibleSolutionException" for a
> problem which has a feasible solution. Just by commenting out the last
> constraint, we get a feasible solution. And for that solution, the constraint
> in question does not seem to be playing a role.
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