<div id="insert"></div> <script src="http://math.chapman.edu/~jipsen/structures/ua.js"></script> <script>init("COSgrp",5,{associative:true,commutative:true,ordered:true})</script>
Trace: • finite_semigroups_with_zero • chains • integral_ordered_monoids • multisets • first-order_classes • boolean_monoids • finite_commutative_ordered_semigroups