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From Arne Plöse (JIRA) <j...@apache.org>
Subject [jira] [Created] (MATH-620) multiplication of infinity
Date Thu, 14 Jul 2011 08:58:59 GMT
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


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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