〈a, b | aabb=a, bbbba=a〉

Properties

• Infinite non-commutative monoid

Completion parameters

• Reduction order: left-to-right ab

Complete rewriting system

1. a³ ⇒ a
2. ab² ⇒ a²
3. b⁴a ⇒ a

Right Cayley graph (truncated)

Left Cayley graph (truncated)