〈a, b | ababba=ab〉

Properties

• Infinite non-commutative monoid

Completion parameters

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

Complete rewriting system

1. c²a ⇒ c
2. abca ⇒ ab
3. cb ⇒ abc²
4. ab² ⇒ c