〈a, b | aab=ab, abaa=aa〉

Properties

• Infinite non-commutative monoid

Completion parameters

• Reduction order: left-to-right ab

Complete rewriting system

1. a³ ⇒ a²
2. a²b ⇒ ab
3. aba² ⇒ a²
4. (ab)² ⇒ ab

Right Cayley graph (truncated)

Left Cayley graph (truncated)