Certificate for #111 ⟨
a
,
b
|
abba
=
aa
⟩
Back:
⟨
a
,
b
|
abba
=
aa
⟩
Completion settings:
Reduction order:
Left-to-right shortlex with
a
<
b
[1]
abba
=
aa
Axiom:
abba
=
aa
.
Defines rule
#1
.