Luc Maisonobe created MATH-935:
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Summary: DerivativeStructure.atan2(y,x) does not handle special
cases properly
Key: MATH-935
URL: https://issues.apache.org/jira/browse/MATH-935
Project: Commons Math
Issue Type: Bug
Affects Versions: 3.1.1
Reporter: Luc Maisonobe
Priority: Minor
The four special cases +/-0 for both x and y should give the same values as
Math.atan2 and FastMath.atan2. However, they give NaN for the value in all
cases.
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