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https://issues.apache.org/jira/browse/STATISTICS-96?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18108758#comment-18108758
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Alex Herbert commented on STATISTICS-96:
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In many cases infinite parameters are allowed. Validation of infinite
parameters should only be performed if the distribution cannot function to
produce results at the limit of the finite parameterisation of the
distribution. This requires checking all distributions function with infinite
arguments comparably to the same arguments approaching Double.MAX_VALUE.
> NaN (and often Infinity) parameters are accepted in many distribution
> factories; location parameters are unvalidated
> --------------------------------------------------------------------------------------------------------------------
>
> Key: STATISTICS-96
> URL: https://issues.apache.org/jira/browse/STATISTICS-96
> Project: Commons Statistics
> Issue Type: Bug
> Components: distribution
> Affects Versions: 1.3
> Reporter: Alex Herbert
> Priority: Minor
>
> Use of NaN and infinite parameters when constructing a distribution results
> in an invalid distribution. Parameter validation should be added to guard
> incorrect usage.
> The following distributions require updating:
> * BetaDistribution
> * CauchyDistribution
> * DistributionException
> * ExponentialDistribution
> * FDistribution
> * FoldedNormalDistribution
> * GammaDistribution
> * GeometricDistribution
> * GumbelDistribution
> * LaplaceDistribution
> * LevyDistribution
> * LogNormalDistribution
> * LogisticDistribution
> * NakagamiDistribution
> * NormalDistribution
> * ParetoDistribution
> * PascalDistribution
> * PoissonDistribution
> * TDistribution
> * TrapezoidalDistribution
> * TriangularDistribution
> * TruncatedNormalDistribution
> * WeibullDistribution
> * ZipfDistribution
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