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Arne Plöse commented on MATH-620: --------------------------------- This goes also wrong: {code} Assert.assertEquals(new Complex(neginf, nan), new Complex(0, inf).multiply(new Complex(0, inf)));// <-- Fail {code} the result is the output of octave - so I would expect the same. Am Donnerstag, den 14.07.2011, 08:58 +0000 schrieb Arne Plöse (JIRA): > 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? -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira