Every positive integer is the Frobenius number of an irreducible numerical semigroup with at most four generators
Tóm tắt
Letg be a positive integer. We prove that there are positive integersn
1,n
2,n
3 andn
4 such that the semigroupS=(n
1,n
2,n
3,n
4) is an irreducible (symmetric or pseudosymmetric) numerical semigroup with g(S)=g.
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