Certificate for #19669 ⟨a, b | aba=a, ababb=aa

Completion settings:

[1] aba=a

Axiom: aba=a.

Defines rule #1.

Referenced by [2].

[2] abb=aa

Axiom: ababb=aa.

Reduce LHS:

[1](aba)bb
abb

Defines rule #2.