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https://issues.apache.org/jira/browse/MAHOUT-684?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13128116#comment-13128116
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Sean Owen commented on MAHOUT-684:
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What's the status here -- Jake did you ever commit this? Can the patch be
revived and be made commit-able again, or has this already been subsumed by
other work, or..?
> Topics regularization for LDA
> -----------------------------
>
> Key: MAHOUT-684
> URL: https://issues.apache.org/jira/browse/MAHOUT-684
> Project: Mahout
> Issue Type: Improvement
> Components: Clustering
> Reporter: Vasil Vasilev
> Priority: Minor
> Labels: LDA.
> Attachments: MAHOUT-684.patch, MAHOUT-684.patch, MAHOUT-684.patch
>
>
> Implementation provided for the alpha parameters estimation as described in
> the paper of Blei, Ng and Jordan
> (http://www.cs.princeton.edu/~blei/papers/BleiNgJordan2003.pdf).
> Remark: there is a mistake in the last formula in A.4.2 (the signs are
> wrong). The correct version is described here:
> http://www.cs.cmu.edu/~jch1/research/dirichlet/dirichlet.pdf (page 6).
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