〈a, b | aba=aab, abb=ba〉

Properties

• Infinite non-commutative monoid

Completion parameters

• Reduction order: left-to-right b/a

Complete rewriting system

1. ba ⇒ ab²
2. a²b² ⇒ a²b

Right Cayley graph (truncated)

Left Cayley graph (truncated)