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〈
a
,
b
|
ababa
=
abab
〉
Monoid presentation of length 9
Properties
Infinite non-commutative monoid
Completion parameters
Reduction order: left-to-right ac/b
Auxiliary generator
abab=c
Complete rewriting system
ca
⇒
c
cb
⇒
abc
(ab)
2
⇒
c