Abstract
We investigate multiplicative subsemigroups of N defined by congruences and give necessary and sufficient conditions for the existence of a divisor theory and espacially for unique factorization.
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References
F. Halter-Koch, Halbgruppen mit Divisorentheorie, Expo. math. (to appear).
R. D. James, I. Niven, Unique factorization in multiplicative systems, Proc. AMS5 (1954), 834–838
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Communicated by L. Márki
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Halter-Koch, F. Arithmetical semigroups defined by congruences. Semigroup Forum 42, 59–62 (1991). https://doi.org/10.1007/BF02573406
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DOI: https://doi.org/10.1007/BF02573406