tailieunhanh - Weak lefschetz property of graded gorenstein algebras associated to the Apéry set of a numerical semigroup

In this paper, we study the weak Lefschetz property of associated graded algebras A of the Apéry set of M-pure symmetric numerical semigroups generated by four natural numbers. These algebras are graded Artinian Gorenstein algebras of codimension three. |

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