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https://issues.apache.org/jira/browse/MAHOUT-737?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13051853#comment-13051853
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Sean Owen commented on MAHOUT-737:
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That's great. On the one hand it's good to have another implementation if it's 
providing value; it would be significantly better the more it can be refactored 
to integrate with existing implementations. I imagine you are implementing 
Recommender for instance and that's good. The more of that the better... just 
trying to avoid becoming a project of 17 individual slightly different 
implementations of similar things.

> Implicit Alternating Least Squares SVD
> --------------------------------------
>
>                 Key: MAHOUT-737
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-737
>             Project: Mahout
>          Issue Type: Improvement
>            Reporter: Tamas Jambor
>
> I am sharing this Java implementation of mine that is based on the paper - 
> Collaborative Filtering with Implicit Datasets. The implementation is 
> multi-treading and can be easily extended to use it on Hadoop. In fact this 
> approach would possibly work with non-implicit datasets, but further testing 
> is needed. The algorithm is tried and tested on an implicit TV-viewing 
> dataset, and the performance was pretty good (details to follow). 

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