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