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From "Benjamin McCann (JIRA)" <j...@apache.org>
Subject [jira] Updated: (MATH-273) Basic variable is not found correctly in simplex tableau
Date Wed, 03 Jun 2009 05:14:07 GMT

     [ https://issues.apache.org/jira/browse/MATH-273?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Benjamin McCann updated MATH-273:
---------------------------------

    Attachment: SimplexSolverTest.patch
                SimplexTableau.patch

Here's the patch.

> Basic variable is not found correctly in simplex tableau
> --------------------------------------------------------
>
>                 Key: MATH-273
>                 URL: https://issues.apache.org/jira/browse/MATH-273
>             Project: Commons Math
>          Issue Type: Bug
>    Affects Versions: 2.0
>            Reporter: Benjamin McCann
>             Fix For: 2.0
>
>         Attachments: SimplexSolverTest.patch, SimplexTableau.patch
>
>
> The last patch to SimplexTableau caused an automated test suite I'm running at work to
go down a new code path and uncover what is hopefully the last bug remaining in the Simplex
code.
> SimplexTableau was assuming an entry in the tableau had to be nonzero to indicate a basic
variable, which is incorrect - the entry should have a value equal to 1.

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