Certificate for #57 ⟨a, b | aa=a, bb=a

Completion settings:

[1] aa=a

Axiom: aa=a.

Referenced by [3].

[2] a=bb

Axiom: bb=a.

Flip LHS and RHS.

Defines rule #2.

Referenced by [3], [4].

[3] aa=bb

Simplify [1] aa=a.

Reduce RHS:

[2](a)
bb

Referenced by [4].

[4] bbbb=bb

Overlap of [3] aa=bb with [2] a=bb:

aa a

Critical pair: bba=bb.

Reduce LHS:

[2]bb(a)
bbbb

Defines rule #1.