><a href="#module-type-HEYTING_ALGEBRA_F" class="anchor"></a><code><span class="keyword">module</span> <span class="keyword">type</span> <a href="module-type-HEYTING_ALGEBRA_F/index.html">HEYTING_ALGEBRA_F</a> = <span class="keyword">functor</span> (<a href="module-type-HEYTING_ALGEBRA_F/argument-1-Ok/index.html">Ok</a> : <a href="../../Interface/index.html#module-type-HEYTING_ALGEBRA">Interface.HEYTING_ALGEBRA</a>) <span>&#45;&gt;</span> <span class="keyword">functor</span> (<a href="module-type-HEYTING_AL