〈a, b | aaaabba=bba〉

Properties

• Infinite non-commutative monoid

Completion parameters

• Reduction order: left-to-right ac/b
• Auxiliary generator bba=c

Complete rewriting system

1. a⁴c ⇒ c
2. b²a ⇒ c
3. b²c ⇒ ca³c