le to the environnement</p></dd></dl><dl><dt class="spec value" id="val-rm_var"><a href="#val-rm_var" class="anchor"></a><code><span class="keyword">val</span> rm_var : <a href="index.html#type-t">t</a> <span>&#45;&gt;</span> <a href="../../../Csp/index.html#type-var">Csp.var</a> <span>&#45;&gt;</span> <a href="index.html#type-t">t</a></code></dt><dd><p>removes an unconstrained variable from the environnement</p></dd></dl><dl><dt class="spec value" id="val-vars"><a href="#val-vars" class="anchor"></a><code>