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Posted to issues@commons.apache.org by "Luc Maisonobe (JIRA)" <ji...@apache.org> on 2011/03/23 21:35:06 UTC

[jira] [Closed] (MATH-483) FastMath does not handle all special cases correctly

     [ https://issues.apache.org/jira/browse/MATH-483?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Luc Maisonobe closed MATH-483.
------------------------------


Closing issue as it was included in version 2.2, which has been released

> FastMath does not handle all special cases correctly
> ----------------------------------------------------
>
>                 Key: MATH-483
>                 URL: https://issues.apache.org/jira/browse/MATH-483
>             Project: Commons Math
>          Issue Type: Bug
>    Affects Versions: 2.2, 3.0
>            Reporter: Sebb
>             Fix For: 2.2, 3.0
>
>         Attachments: MATH-483-generic.patch, MATH-483.patch
>
>
> FastMath has some issues with special cases such as +0.0 and -0.0.
> Here are the double cases so far found:
> abs(-0.0) expected:<0.0> but was:<-0.0>
> signum(-0.0) expected:<-0.0> but was:<0.0>
> asin(-0.0) expected:<-0.0> but was:<0.0>
> atan(-0.0) expected:<-0.0> but was:<0.0>
> log10(-0.0) expected:<-Infinity> but was:<NaN>
> toDegrees(-0.0) expected:<-0.0> but was:<0.0>
> toRadians(-0.0) expected:<-0.0> but was:<0.0>
> ulp(-Infinity) expected:<Infinity> but was:<NaN>
> And float cases:
> abs(-0.0) expected:<0.0> but was:<-0.0>

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