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