Coefficient ring;
Frobenius monomial;
Gap monomial;
Irreducibility;
Numerical semigroup algebra;
Radical;
Symmetry;
ONE HALF;
D O I:
10.1007/s00233-021-10217-7
中图分类号:
O1 [数学];
学科分类号:
0701 ;
070101 ;
摘要:
Numerical semigroup rings are investigated from the relative viewpoint. It is known that algebraic properties such as singularities of a numerical semigroup ring are properties of a flat numerical semigroup algebra. In this paper, we show that arithmetic and set-theoretic properties of a numerical semigroup ring are properties of an equi-gcd numerical semigroup algebra.