yword">type</span> t</code><code> = <span><a href="../../../../../Int/Multiplicative/Semigroup/index.html#type-t">Int.Multiplicative.Semigroup.t</a> option</span></code></dt></dl><dl><dt class="spec value" id="val-append"><a href="#val-append" class="anchor"></a><code><span class="keyword">val</span> append : <a href="index.html#type-t">t</a> <span>&#45;&gt;</span> <a href="index.html#type-t">t</a> <span>&#45;&gt;</span> <a href="index.html#type-t">t</a></code></dt><dt class="spec value" id="val-empty"><a h