">mutable</span> us : <span><span><a href="../Algodiff/index.html#type-t">Algodiff.t</a> array</span> array</span>;</span></code></li><li id="type-state.ch" class="def record field anchored"><a href="#type-state.ch" class="anchor"></a><code><span><span class="keyword">mutable</span> ch : <span><span><span><a href="../Algodiff/index.html#type-t">Algodiff.t</a> array</span> array</span> array</span>;</span></code></li></ol><code><span>}</span></code></div></div><div class="odoc-spec"><div class="spec type anc