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Posted to issues@commons.apache.org by "Gilles (Resolved) (JIRA)" <ji...@apache.org> on 2011/10/02 23:17:34 UTC
[jira] [Resolved] (MATH-620) multiplication of infinity
[ https://issues.apache.org/jira/browse/MATH-620?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Gilles resolved MATH-620.
-------------------------
Resolution: Won't Fix
See MATH-667 for an alternative solution.
> multiplication of infinity
> --------------------------
>
> Key: MATH-620
> URL: https://issues.apache.org/jira/browse/MATH-620
> Project: Commons Math
> Issue Type: Bug
> Affects Versions: 3.0
> Reporter: Arne Plöse
> Priority: Minor
> Attachments: ComplexOctaveTest.java, arne_tests.zip, arne_tests.zip
>
>
> Take the following testcase
> {code}
> Assert.assertEquals(neginf, inf* neginf, Double.MIN_VALUE); // <--Passes ordinary double
> Assert.assertEquals(new Complex(neginf, 0), new Complex(inf, 0).multiply(new Complex(neginf, 0)));// <-- Fail only real parts no imaginary parts
> {code}
> The outcome of multiply is Complex.INF if one part is infinity.
> why not simply compute the multiplication and thats is?
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