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