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〈
a
,
b
|
abbaab
=
aaa
〉
Monoid presentation of length 9
Properties
Infinite non-commutative monoid
Completion parameters
Reduction order: left-to-right ba
Complete rewriting system
ab
2
a
2
b
⇒
a
3
a(a
2
b)
2
⇒
ab
2
a
4