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https://issues.apache.org/jira/browse/MATH-1089?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13874004#comment-13874004
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Thomas Neidhart commented on MATH-1089:
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This not only affects negative zero, but all negative values that would be
rounded to 0.
In these cases the result should be negative zero to be consistent with the
result of Precision.round(float, x).
> Precision.round() returns different results when provided negative zero as
> double or float
> ------------------------------------------------------------------------------------------
>
> Key: MATH-1089
> URL: https://issues.apache.org/jira/browse/MATH-1089
> Project: Commons Math
> Issue Type: Bug
> Reporter: Thomas Neidhart
>
> Precision.round(-0.0d, x) = 0.0
> Precision.round(-0.0f, x) = -0.0
> After discussion on the mailinglist, the result should always be -0.0.
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