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Date: Fri, 2 Sep 2011 22:40:10 +0000 (UTC)
From: "Gilles (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (MATH-620) multiplication of infinity
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    [ https://issues.apache.org/jira/browse/MATH-620?page=3Dcom.atlassian.j=
ira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=3D130964=
44#comment-13096444 ]=20

Gilles commented on MATH-620:
-----------------------------

I've create a new ticket for the above: MATH-657

> 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 Pl=C3=B6se
>            Priority: Minor
>
> Take the following testcase=20
> {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=20
> {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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