Math.gamma fails on certain values when it shouldn't
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Key: JRUBY-3936
URL: http://jira.codehaus.org/browse/JRUBY-3936
Project: JRuby
Issue Type: Bug
Components: Ruby 1.9
Affects Versions: JRuby 1.4
Environment: github trunk, Mac OS X 10.6, Java 6
Reporter: Hiro Asari
Assignee: Thomas E Enebo
Fix For: JRuby 1.4
Attachments:
0001-Math.gamma-Math.lgamma-should-return-valid-values-fo.patch
When I changed the internals while working on JRUBY-3811, I forgot to consider
signs in certain cases. As a result, Math.gamma(x) and Math.lgamma(x) fail for
x in intervals (2n-1,2n) for n<=0. Attached patch fixes this issue.
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