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https://issues.apache.org/jira/browse/MATH-870?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13817495#comment-13817495
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Gilles commented on MATH-870:
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Currently, no. But contributors are very much welcome to do so.
And users are welcome to indicate whether they successfully use the current
code, even with the identified shortcomings.
There have been recurrent discussions on this on the "dev" ML.
> Deprecate interfaces and implementations of sparse vectors and matrices
> -----------------------------------------------------------------------
>
> Key: MATH-870
> URL: https://issues.apache.org/jira/browse/MATH-870
> Project: Commons Math
> Issue Type: Improvement
> Affects Versions: 4.0
> Reporter: Sébastien Brisard
> Priority: Minor
>
> Recently, many problems have been found out with class
> {{OpenMapRealVector}} (see MATH-803 and MATH-821), to the point that the
> complete removal of this class in upcoming versions (as of 4.0) has been
> agreed [markmail|http://markmail.org/thread/bseyswf7qqrgatru].
> Since it now becomes useless, {{SparseRealVector}} will also be removed. For
> the sake of consistency, {{SparseFieldVector}} will also be removed.
> Furthermore, it is expected that the same kind of bugs will occur with sparse
> implementations of real/field matrices, which will also be removed.
> In version 3.1, the following classes and interfaces will be deprecated
> * {{SparseRealVector}}
> * {{OpenMapRealVector}}
> * {{SparseFieldVector}}
> * {{SparseRealMatrix}}
> * {{OpenMapRealMatrix}}
> * {{SparseFieldMatrix}}
> They will be completely removed in version 4.0.
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