〈a, b | aa=a, abbab=bba〉

Properties

• Infinite non-commutative monoid

Completion parameters

• Reduction order: left-to-right ab

Complete rewriting system

1. a² ⇒ a
2. ab²a ⇒ b²a
3. b²ab ⇒ b²a
4. b⁴a ⇒ b²a

Right Cayley graph (truncated)

Left Cayley graph (truncated)