e><span><span class="keyword">val</span> trace : <span><a href="../index.html#type-t">t</a> <span class="arrow">&#45;&gt;</span></span> <a href="../index.html#type-t">t</a></span></code></div><div class="spec-doc"><p>Refer to :doc:`owl_dense_ndarray_generic`</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-triu"><a href="#val-triu" class="anchor"></a><code><span><span class="keyword">val</span> triu : <span><span class="optlabel">?k</span>:int <span class="arrow">&#45;&gt;</spa