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arXiv · 2112.02294

The first Hilbert coefficient of stretched ideals

Kazuho Ozeki
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Abstract

In this paper we explore the almost Cohen-Macaulayness of the associated graded ring of stretched $\mathfrak{m}$-primary ideals with small first Hilbert coefficient in a Cohen-Macaulay local ring $(A,\mathfrak{m})$. In particular, we explore the structure of stretched $\mathfrak{m}$-primary ideals satisfying the equality $\mathrm{e}_1(I)=\mathrm{e}_0(I)-\ell_A(A/I)+4$ where $\mathrm{e}_0(I)$ and $\mathrm{e}_1(I)$ denote the multiplicity and the first Hilbert coefficient respectively.

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Kazuho Ozeki. 2021-12-04. The first Hilbert coefficient of stretched ideals. https://arxiv.org/abs/2112.02294

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