free semigroup

 

In abstract algebra, a free semigroup over a set is all possible finite sequences constructed from one or more of the set’s elements. Unlike free monoids, free semigroups have no identity element and the empty set ε does not exist. Like free monoids, concatenation is the semigroup operation. The free semigroup of a set A is denoted A+.

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 Posted by at 11:18 am

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