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〈
a
,
b
|
abbaab
=
a
〉
Monoid presentation of length 7
Properties
Infinite non-commutative monoid
Completion parameters
Reduction order: left-to-right ba
Complete rewriting system
a
3
b
⇒
aba
2
aba
2
b
⇒
ab
2
a
2
ab
2
a
2
b
⇒
a