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>Concrete algorithms for word problem and subsemigroup problem for
semigroups which are disjoint unions of finitely many copies of the free
monogenic semigroup
【2h】
Concrete algorithms for word problem and subsemigroup problem for
semigroups which are disjoint unions of finitely many copies of the free
monogenic semigroup
Every semigroup which is a finite disjoint union of copies of the free mono-genic semigroup (natural numbers under addition) has soluble word prob- lem andsoluble membership problem. Efficient algorithms are given for both problems.
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