Certificate for #266 ⟨a, b | abba=abb

Completion settings:

[1] abba=abb

Axiom: abba=abb.

Referenced by [3].

[2] abb=c

Axiom: abb=c.

Defines rule #2.

Referenced by [3], [4], [5].

[3] abba=c

Simplify [1] abba=abb.

Reduce RHS:

[2](abb)
c

Referenced by [4].

[4] ca=c

Overlap of [3] abba=c with [2] abb=c:

abba abb

Critical pair: ca=c.

Defines rule #1.

Referenced by [5].

[5] cbb=cc

Overlap of [4] ca=c with [2] abb=c:

c a abb

Critical pair: cc=cbb.

Flip LHS and RHS.

Defines rule #3.