"keyword">include</span> <a href="../../../Signature/index.html#module-type-Numeric">Signature.Numeric</a></code></span></summary><dl><dt class="spec type" id="type-t"><a href="#type-t" class="anchor"></a><code><span class="keyword">type</span> t</code></dt><dd><p>the type of (non-bottom) abstract elements</p></dd></dl><dl><dt class="spec value" id="val-empty"><a href="#val-empty" class="anchor"></a><code><span class="keyword">val</span> empty : <a href="index.html#type-t">t</a></code></dt><dd><p>returns an