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https://issues.apache.org/jira/browse/MATH-540?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13003369#comment-13003369
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Phil Steitz commented on MATH-540:
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You have a choice in defining the inverse cum whether to define it the way we
have or to use and inf rather than a sup. We can implement sampling using the
current impl. We just need to take into account the way the inverse cum is
defined in AbstractIntegerDistribution.
> AbstractIntegerDistribution.inverseCumulativeProbability(...) Bug
> -----------------------------------------------------------------
>
> Key: MATH-540
> URL: https://issues.apache.org/jira/browse/MATH-540
> Project: Commons Math
> Issue Type: Bug
> Affects Versions: 2.1
> Reporter: Ole Ersoy
> Fix For: 3.0
>
> Attachments: DummyDiscreteDistribution.java,
> DummyDiscreteDistributionTest.java
>
>
> The AbstractIntegerDistribution.inverseCumulativeProbability(...) function
> attempts to decrement the lower bound of discrete distributions to values
> that go below the lower bound.
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