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https://issues.apache.org/jira/browse/MATH-618?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Phil Steitz resolved MATH-618.
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Resolution: Fixed
Fixed in r1146573
> Complex Add and Subtract handle NaN arguments differently, but javadoc
> contracts are the same
> ---------------------------------------------------------------------------------------------
>
> Key: MATH-618
> URL: https://issues.apache.org/jira/browse/MATH-618
> Project: Commons Math
> Issue Type: Bug
> Affects Versions: 1.2, 2.0, 2.1, 2.2
> Reporter: Phil Steitz
> Fix For: 3.0
>
>
> For both Complex add and subtract, the javadoc states that
> {code}
> * If either this or <code>rhs</code> has a NaN value in either part,
> * {@link #NaN} is returned; otherwise Inifinite and NaN values are
> * returned in the parts of the result according to the rules for
> * {@link java.lang.Double} arithmetic
> {code}
> Subtract includes an isNaN test and returns Complex.NaN if either complex
> argument isNaN; but add omits this test. The test should be added to the add
> implementation (actually restored, since this looks like a code merge problem
> going back to 1.1).
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