Certificate for #17 ⟨a, b, c | ab=c, cc=1⟩

Completion settings:

[1] c=ab

Axiom: ab=c.

Flip LHS and RHS.

Defines rule #2.

Referenced by [2].

[2] abab=1

Axiom: cc=1.

Reduce LHS:

[1](c)c
[1]⇒ ab(c)
⇒ abab

Defines rule #1.