../Libabsolute__/Consistency/index.html#type-t">Libabsolute__.Consistency.t</a></span></code></dt><dt class="spec value" id="val-filter_neg"><a href="#val-filter_neg" class="anchor"></a><code><span class="keyword">val</span> filter_neg : <a href="index.html#type-t">t</a> <span>&#45;&gt;</span> <a href="index.html#type-t">t</a> <span>&#45;&gt;</span> <span><a href="index.html#type-t">t</a> option</span></code></dt><dd><p>given the interval argument(s) and the expected interval result of a numeric operation, 