〈a, b | aba=aa, abbb=ba〉

Properties

• Infinite non-commutative monoid

Completion parameters

• Reduction order: left-to-right b/a

Complete rewriting system

1. ba ⇒ ab³
2. a²b³ ⇒ a²

Right Cayley graph (truncated)

Left Cayley graph (truncated)