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From Sébastien Brisard (Commented) (JIRA) <j...@apache.org>
Subject [jira] [Commented] (MATH-770) SymmLQ not tested in SymmLQTest
Date Fri, 23 Mar 2012 07:53:30 GMT

    [ https://issues.apache.org/jira/browse/MATH-770?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13236438#comment-13236438
] 

Sébastien Brisard commented on MATH-770:
----------------------------------------

Test corrected in {{r1304216}}. Failure was due to the fact that in {{SymmLQ}}, the residual
for the preconditioned system is really {{P * r}}, where {{r = b - A * x}}, and {{P}} is the
square root of the preconditioner.
                
> SymmLQ not tested in SymmLQTest
> -------------------------------
>
>                 Key: MATH-770
>                 URL: https://issues.apache.org/jira/browse/MATH-770
>             Project: Commons Math
>          Issue Type: Bug
>    Affects Versions: 3.0, 3.1
>            Reporter: Sébastien Brisard
>            Assignee: Sébastien Brisard
>              Labels: linear, solver
>             Fix For: 3.1
>
>
> In {{SymmLQTest}}, two test actually create instances of {{ConjugateGradient}} instead
of {{SymmLQ}}. These tests are
> * {{testUnpreconditionedNormOfResidual()}}
> * {{testPreconditionedNormOfResidual()}}.

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