〈a, b | abbabbba=ab〉

Properties

• Infinite non-commutative monoid

Completion parameters

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

Complete rewriting system

1. c⁴a ⇒ c²ac²
2. c²ac³a ⇒ c
3. ab ⇒ c(ca)²
4. cb ⇒ c²ac²