<div id="insert"></div> <script src="http://math.chapman.edu/~jipsen/structures/ua.js"></script> <script>init("OSgrp",4,{associative:true,ordered:true})</script>
Trace: • commutative_rings_with_identity • finite_commutative_ordered_semigroups • commutative_partially_ordered_semigroups • regular_semigroups • commutative_integral_ordered_monoids • terms • universal_formulas • first-order_classes • directed_graphs • finite_ordered_semigroups