〈a, b | abb=aba, bbbb=b〉

Properties

• Infinite non-commutative monoid

Completion parameters

• Reduction order: left-to-right ba

Complete rewriting system

1. aba ⇒ ab²
2. b⁴ ⇒ b
3. ab²a ⇒ ab³
4. ab³a ⇒ ab

Right Cayley graph (truncated)

Left Cayley graph (truncated)