〈a, b | aab=ba, abaa=bb〉

Properties

• Infinite non-commutative monoid

Completion parameters

• Reduction order: right-to-left a/b

Complete rewriting system

1. a⁸b ⇒ a⁷b
2. ba ⇒ a²b
3. b² ⇒ a⁵b

Right Cayley graph (truncated)

Left Cayley graph (truncated)