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https://issues.apache.org/jira/browse/MATH-896?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Luc Maisonobe resolved MATH-896.
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Resolution: Not A Problem
As explained in the first comments, this behaviour is the expected one for the
Brent algorithm.
> BrentSolver : function value accuracy convergence criterion
> -----------------------------------------------------------
>
> Key: MATH-896
> URL: https://issues.apache.org/jira/browse/MATH-896
> Project: Commons Math
> Issue Type: Bug
> Affects Versions: 3.0
> Reporter: Vincent Ruch
> Priority: Minor
>
> Hi everybody,
> In the current implementation of the Brent solver, it seems that attribute
> "functionValueAccuracy" is only used in the "doSolve" method, before entering
> the iteration loop in "brent" method.
> Shouldn't it be a convergence test on the current function value to ensure
> that function value accuracy is reached?
> This is the first time I'm posting here, so maybe I have missed something.
> Sorry if it's the case.
> Thanks for your time,
> Vincent
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