r"></a><code><span class="keyword">val</span> plus_offset : <a href="index.html#type-t">t</a> <span>&#45;&gt;</span> <a href="../BO/Itv/index.html#type-t">BO.Itv.t</a> <span>&#45;&gt;</span> <a href="index.html#type-t">t</a></code></dt><dt class="spec value" id="val-diff"><a href="#val-diff" class="anchor"></a><code><span class="keyword">val</span> diff : <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="../BO/Itv/index.html#type-t">BO