〈a, b | aba=aa, babb=bb〉

Properties

• Infinite non-commutative monoid

Completion parameters

• Reduction order: left-to-right ab

Complete rewriting system

1. aba ⇒ a²
2. a²b² ⇒ ab²
3. bab² ⇒ b²

Right Cayley graph (truncated)

Left Cayley graph (truncated)