Certificate for #60 ⟨a, b | aa=b, ab=b⟩

Completion settings:

[1] b=aa

Axiom: aa=b.

Flip LHS and RHS.

Defines rule #2.

Referenced by [2].

[2] aaa=aa

Axiom: ab=b.

Reduce LHS:

[1]a(b)
⇒ aaa

Reduce RHS:

[1](b)
⇒ aa

Defines rule #1.