Certificate for #12434 ⟨a, b | aabb=aa, abba=a⟩

Completion settings:

• Reduction order:
  • Left-to-right shortlex with a < b

Axiom: aabb=aa.

Defines rule #2.

Referenced by [3].

Axiom: abba=a.

Defines rule #3.

Referenced by [3].

Overlap of [1] aabb=aa with [2] abba=a:

Critical pair: aa=aaa.

Flip LHS and RHS.

Defines rule #1.