The Mathematical Gazette is the original journal of the Mathematical Association and it is now over a century old. Its readership is a mixture of school teachers, college and university lecturers, ...
This paper describes a constructive method of finding all congruences ρ on commutative cancellative archimedean semigroups S without idempotents (N-semigroups) such that S/ρ is noncancellative and ...
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