Github user jkbradley commented on the pull request:
https://github.com/apache/spark/pull/13139#issuecomment-221167413
@yanboliang @sethah Could you please reconcile this PR with
[https://github.com/apache/spark/pull/13262]? Either option is OK with me. If
I had to choose, I'd put the optimization stuff in ml-advanced since most users
will not need to know it.
@sethah Where are you drawing your notation from? If it's a source online,
could you link to it?
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