n <code>t</code>, as determined by <code>compare</code>, or <code>None</code> if <code>is_empty t</code>.</p></dd></dl><dl><dt class="spec value" id="val-min"><a href="#val-min" class="anchor"></a><code><span class="keyword">val</span> min : <span>compare:<span>(<span class="type-var">'a</span> <span>&#45;&gt;</span> <span class="type-var">'a</span> <span>&#45;&gt;</span> int)</span></span> <span>&#45;&gt;</span> <span><span class="type-var">'a</span> <a href="index.html#type-t">t</a></span> <span>&#45;&gt;