〈a, b | abb=aba, bab=ba〉

Properties

• Infinite non-commutative monoid

Completion parameters

• Reduction order: left-to-right ab

Complete rewriting system

1. ab² ⇒ aba
2. ba² ⇒ ba
3. bab ⇒ ba

Right Cayley graph (truncated)

Left Cayley graph (truncated)