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Finitely generated commutative semigroups
Published online by Cambridge University Press: 18 May 2009
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Since all the semigroups considered in this paper are commutative, we shall use the terms “semigroup” and “group” where we actually mean “commutative semigroup” and “commutative group”. Some basic results from the theory of semigroups are required and will be used without explicit mention; these results may be found in [1, § 4.3]. We shall denote the additive semigroups of integers, positive integers, negative integers, positive rationals by Z, Z+, Z-, Q+ respectively.
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- Copyright © Glasgow Mathematical Journal Trust 1970
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