〈a, b | aaaa=a, aabba=a〉

Properties

• Infinite non-commutative monoid

Completion parameters

• Reduction order: left-to-right ab

Complete rewriting system

1. a⁴ ⇒ a
2. ab²a ⇒ a³

Right Cayley graph (truncated)

Left Cayley graph (truncated)