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From "Ted Dunning (JIRA)" <>
Subject [jira] Reopened: (MATH-267) Need a digamma function
Date Sun, 24 May 2009 06:38:46 GMT


Ted Dunning reopened MATH-267:

The previous patch lost some comments from my original.

Also, I added a trigramma function.  

> Need a digamma function
> -----------------------
>                 Key: MATH-267
>                 URL:
>             Project: Commons Math
>          Issue Type: Bug
>            Reporter: Ted Dunning
>             Fix For: 2.0
>         Attachments: Adds_digamma_function.patch, digamma.tgz
> A mahout summer of code student needed a digamma function with Apache permissions so
I wrote one.  It includes test cases, correct copyright and seems to work well.  I don't know
where in commons math this would go so I figured I would post this and ask for advice.

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