[jira] [Closed] (MATH-493) FastMath min and max fail with (Infinity,-Infinity) and (0,0, -0.0)

["Luc Maisonobe (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MATH-493?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Luc Maisonobe closed MATH-493.
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Closing issue as it was included in version 2.2, which has been released

> FastMath min and max fail with (Infinity,-Infinity) and (0,0, -0.0)
> -------------------------------------------------------------------
>
>                 Key: MATH-493
>                 URL: https://issues.apache.org/jira/browse/MATH-493
>             Project: Commons Math
>          Issue Type: Bug
>    Affects Versions: 2.2, 3.0
>            Reporter: Sebb
>             Fix For: 2.2, 3.0
>
>
> FastMath min and max fail with (Infinity,-Infinity) and (0,0, -0.0):
> min(float 0.0, float -0.0) expected -0.0 actual 0.0
> min(float Infinity, float -Infinity) expected -Infinity actual NaN
> max(float 0.0, float -0.0) expected 0.0 actual -0.0
> max(float Infinity, float -Infinity) expected Infinity actual NaN
> Similarly for the double versions.
> The Infinity failures are because the code uses Float.isNaN(a + b) which gives NaN when +/1- Infinity are added together.

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