html">Up</a> â€“ <a href="../index.html">owl-base</a> &#x00BB; Owl_types_ndarray_numdiff</nav><header class="odoc-preamble"><h1>Module <code><span>Owl_types_ndarray_numdiff</span></code></h1></header><div class="odoc-content"><div class="odoc-spec"><div class="spec module-type anchored" id="module-type-Sig"><a href="#module-type-Sig" class="anchor"></a><code><span><span class="keyword">module</span> <span class="keyword">type</span> <a href="module-type-Sig/index.html">Sig</a></span><span> = <span clas