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https://issues.apache.org/jira/browse/MATH-1004?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13793395#comment-13793395
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Gilles commented on MATH-1004:
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bq. [...] adding MatrixUtils.inverse(RealMatrix) and have it just do the
instanceOf check [...]
Do you mean that we would forbid users to call this method on an invertible
matrix that happens to not be of the "DiagonalMatrix" type?
bq. [...] whether or not to add inverse(DiagonalMatrix) to the public API.
IMHO, we should avoid crowding "XxxUtils" classes. IOW, there should be a good
reason why the method cannot be somewhere else.
> Inversion of diagonal matrix
> ----------------------------
>
> Key: MATH-1004
> URL: https://issues.apache.org/jira/browse/MATH-1004
> Project: Commons Math
> Issue Type: New Feature
> Reporter: Ajo Fod
> Priority: Minor
> Attachments: MATH-1004.patch
>
>
> This should be a very easy feature to add and has many applications.
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