〈a, b | aba=aab, bba=ab〉

Properties

• Infinite non-commutative monoid

Completion parameters

• Reduction order: right-to-left b/a

Complete rewriting system

1. ab ⇒ b²a
2. b⁴a² ⇒ b²a²

Right Cayley graph (truncated)

Left Cayley graph (truncated)