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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-8208) Vector.isNumericallyIdentical() can produce unexpected results
Date Thu, 15 Mar 2018 16:30:00 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-8208?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16400668#comment-16400668
] 

ASF subversion and git services commented on LUCENE-8208:
---------------------------------------------------------

Commit b896fe68a72072cb3cc58f22b61eaf775ec8ddc2 in lucene-solr's branch refs/heads/master
from [~kwright@metacarta.com]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=b896fe6 ]

LUCENE-8208: Use a tighter definition of identical when it comes to vectors.


> Vector.isNumericallyIdentical() can produce unexpected results
> --------------------------------------------------------------
>
>                 Key: LUCENE-8208
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8208
>             Project: Lucene - Core
>          Issue Type: Bug
>          Components: modules/spatial3d
>            Reporter: Ignacio Vera
>            Assignee: Karl Wright
>            Priority: Major
>         Attachments: LUCENE-8208.patch
>
>
> The method {{Vector.isNumericallyIdentical()}} seems to produce wrong results in some
cases. For example it considers that vectors (1,0,0) and (-1,0,0) are numerically identical
whichI is probably wrong.
> This behavior might produce unexpected behaviors down the line.
>  



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