</code></dt><dt class="spec value" id="val-filter_max"><a href="#val-filter_max" class="anchor"></a><code><span class="keyword">val</span> filter_max : <span class="type-var">'a</span> <span>&#45;&gt;</span> <span class="type-var">'b</span> <span>&#45;&gt;</span> <span class="type-var">'c</span> <span>&#45;&gt;</span> <span><span>(<span class="type-var">'a</span> * <span class="type-var">'b</span>)</span> option</span></code></dt><dt class="spec value" id="val-filter_fun"><a href="#val-filter_fun" class="an