dicates.atom</a></span></code></div><div class="spec-doc"><p>Negate an atom</p></div></div><h3 id="ordinary-theorem-proving"><a href="#ordinary-theorem-proving" class="anchor"></a>Ordinary Theorem Proving</h3><div class="odoc-spec"><div class="spec value" id="val-check_zero" class="anchored"><a href="#val-check_zero" class="anchor"></a><code><span><span class="keyword">val</span> check_zero : <span><a href="../../IR/Tenv/index.html#type-t">IR.Tenv.t</a> <span class="arrow">&#45;&gt;</span></span> <span><a h