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<!DOCTYPE html>
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<h1 class="title">Advanced topics - spark.ml</h1>
<h1 id="optimization-of-linear-methods">Optimization of linear methods</h1>
<p>The optimization algorithm underlying the implementation is called
<a href="http://research-srv.microsoft.com/en-us/um/people/jfgao/paper/icml07scalable.pdf">Orthant-Wise Limited-memory
QuasiNewton</a>
(OWL-QN). It is an extension of L-BFGS that can effectively handle L1
regularization and elastic net.</p>
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