〈a, b | aab=aa, abbba=a〉

Properties

• Infinite non-commutative monoid

Completion parameters

• Reduction order: left-to-right ab

Complete rewriting system

1. a³ ⇒ a²
2. a²b ⇒ a²
3. ab³a ⇒ a

Right Cayley graph (truncated)

Left Cayley graph (truncated)