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〈
a
,
b
|
aabaab
=
aa
〉
Monoid presentation of length 8
Properties
Infinite non-commutative monoid
Completion parameters
Reduction order: left-to-right ba
Complete rewriting system
a
4
b
⇒
a
2
ba
2
(a
2
b)
2
⇒
a
2