s (see [<a href="doc_spams010.html#mairal10">22</a>, <a href="doc_spams010.html#mairal13">23</a>]);
</li><li class="li-itemize">trace norm;
</li><li class="li-itemize">ℓ<sub>0</sub> pseudo-norm (only with ISTA);
</li><li class="li-itemize">tree-structured ℓ<sub>0</sub> (only with ISTA);
</li><li class="li-itemize">rank regularization for matrices (only with ISTA);
</li><li class="li-itemize">the path-coding penalties of [<a href="doc_spams010.html#mairal14">24</a>].
</li></ul>
All of these regularizati