Certificate for #7407 ⟨a, b, c | ab=1, acac=aa⟩

Completion settings:

[1] ab=1

Axiom: ab=1.

Defines rule #1.

[2] acac=aa

Axiom: acac=aa.

Defines rule #2.

Referenced by [3].

[3] aaac=acaa

Overlap of [2] acac=aa with [2] acac=aa:

ac ac acac

Critical pair: acaa=aaac.

Flip LHS and RHS.

Defines rule #3.