〈a, b | abbaab=aaab〉

Properties

• Infinite non-commutative monoid

Completion parameters

• Reduction order: left-to-right b/ca
• Auxiliary generator aaab=c

Complete rewriting system

1. a²c ⇒ cba²b
2. ab²ac ⇒ cba²b
3. a³b ⇒ c
4. ab²a²b ⇒ c