Certificate for #21112 ⟨a, b | bb=aa, abab=aba

Completion settings:

[1] bb=aa

Axiom: bb=aa.

Defines rule #5.

Referenced by [3], [4], [5], [11].

[2] abab=aba

Axiom: abab=aba.

Referenced by [4], [5], [6], [8], [9].

[3] aab=baa

Overlap of [1] bb=aa with [1] bb=aa:

b b bb

Critical pair: baa=aab.

Flip LHS and RHS.

Defines rule #4.

Referenced by [5], [6], [8], [10], [11].

[4] abaaa=aba

Overlap of [2] abab=aba with [1] bb=aa:

aba b bb

Critical pair: abaaa=abab.

Reduce RHS:

[2](abab)
aba

Referenced by [7].

[5] abaa=aaaaa

Overlap of [2] abab=aba with [2] abab=aba:

ab ab abab

Critical pair: ababa=abaab.

Reduce LHS:

[2](abab)a
abaa

Reduce RHS:

[3]ab(aab)
[1]a(bb)aa
aaaaa

Referenced by [6], [7].

[6] baaaaa=baaa

Overlap of [3] aab=baa with [2] abab=aba:

a ab abab

Critical pair: aaba=baaab.

Reduce LHS:

[3](aab)a
baaa

Reduce RHS:

[3]ba(aab)
[5]b(abaa)
baaaaa

Flip LHS and RHS.

Referenced by [8].

[7] aba=aaaaaa

Simplify [4] abaaa=aba.

Reduce LHS:

[5](abaa)a
aaaaaa

Flip LHS and RHS.

Defines rule #3.

Referenced by [8], [9], [10], [11].

[8] baaaa=aaaaaa

Overlap of [2] abab=aba with [7] aba=aaaaaa:

abab aba

Critical pair: aaaaaab=aba.

Reduce LHS:

[3]aaaa(aab)
[3]aa(aab)aa
[3](aab)aaaa
[6](baaaaa)a
baaaa

Reduce RHS:

[7](aba)
aaaaaa

Referenced by [9].

[9] aaaaaaaaa=aaaaaaa

Overlap of [2] abab=aba with [7] aba=aaaaaa:

ab ab aba

Critical pair: abaaaaaa=abaa.

Reduce LHS:

[8]a(baaaa)aa
aaaaaaaaa

Reduce RHS:

[7](aba)a
aaaaaaa

Referenced by [11].

[10] baaa=aaaaaaa

Overlap of [3] aab=baa with [7] aba=aaaaaa:

a ab aba

Critical pair: aaaaaaa=baaa.

Flip LHS and RHS.

Referenced by [12].

[11] aaaaaaa=aaaaa

Overlap of [7] aba=aaaaaa with [3] aab=baa:

ab a aab

Critical pair: abbaa=aaaaaaab.

Reduce LHS:

[1]a(bb)aa
aaaaa

Reduce RHS:

[3]aaaaa(aab)
[3]aaa(aab)aa
[3]a(aab)aaaa
[7](aba)aaaaa
[9](aaaaaaaaa)aa
[9](aaaaaaaaa)
aaaaaaa

Flip LHS and RHS.

Defines rule #1.

Referenced by [12].

[12] baaa=aaaaa

Simplify [10] baaa=aaaaaaa.

Reduce RHS:

[11](aaaaaaa)
aaaaa

Defines rule #2.