atures of this toolbox is to provide a robust stopping criterion based on
<em>duality gaps</em> to control the quality of the optimization, whenever
possible. It also handles sparse feature matrices for large-scale problems. The following regularizations are implemented:
<ul class="itemize"><li class="li-itemize">
Tikhonov regularization (squared ℓ<sub>2</sub>-norm);
</li><li class="li-itemize">ℓ<sub>1</sub>-norm, ℓ<sub>2</sub>, ℓ<sub>∞</sub>-norms;
</li><li class="li-itemize">Elastic-Net [<a hre