<div id="insert"></div> <script src="http://math.chapman.edu/~jipsen/structures/ua.js"></script> <script>init("CBinZ",4,{commutative:true,zero:true})</script>
Trace: • directoids • commutative_semigroups • commutative_ordered_rings • rings_with_identity • partial_semigroups • first-order_classes • commutative_ordered_semigroups • ordered_semigroups • commutative_ordered_monoids • finite_commutative_binars_with_zero