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https://issues.apache.org/jira/browse/MAHOUT-1532?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13986447#comment-13986447
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Sean Owen commented on MAHOUT-1532:
-----------------------------------

Yes Cholesky requires symmetric positive definite. You need QR for the more 
general case here. 

> Add solve() function to the Scala DSL 
> --------------------------------------
>
>                 Key: MAHOUT-1532
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1532
>             Project: Mahout
>          Issue Type: Bug
>          Components: Math
>            Reporter: Sebastian Schelter
>             Fix For: 1.0
>
>         Attachments: MAHOUT-1532.patch
>
>
> We should add a solve() function to the Scala DSL with helps with solving Ax 
> = b for in-core matrices and vectors.



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