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arXiv 1503.02687math.AC
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几乎等差数列定义的$\mathbb{A}^{4}$中多项式曲线的最小分次自由分解

Minimal Graded Free Resolution for Monomial Curves in $\mathbb{A}^{4}$ defined by almost arithmetic sequences

Achintya Kumar Roy, Indranath Sengupta, Gaurab Tripathi

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Accepted for publication in Communication in Algebra
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摘要：

令$\mm=(m_0,m_1,m_2,n)$是几乎算术序列，即，正整数序列与${\rm gcd}(m_0,m_1,m_2,n) = 1$，使得$m_0<m_1<m_2$形成等差数列，$n$是任意的，它们极小地生成数值半群$Γ= m_0\N + m_1\N + m_2\N + n\N$。让$k$成为一个字段。由$X_0=t^{m_0},X_{1}=t^{m_1},X_2=t^{m_3},Y=t^{n}$参数化定义的仿射单项曲线的齐次坐标环$k[Γ]$是分次$R$ -模，其中$R$是具有分次$°{X_i}:=m_i, °{Y}:=n$的多项式环$k[X_0,X_1,X_3, Y]$。本文构造了$k[Γ]$的最小分次自由分解。

英文摘要：

Let $\mm=(m_0,m_1,m_2,n)$ be an almost arithmetic sequence, i.e., a sequence of positive integers with ${\rm gcd}(m_0,m_1,m_2,n) = 1$, such that $m_0<m_1<m_2$ form an arithmetic progression, $n$ is arbitrary and they minimally generate the numerical semigroup $Γ= m_0\N + m_1\N + m_2\N + n\N$. Let $k$ be a field. The homogeneous coordinate ring $k[Γ]$ of the affine monomial curve parametrically defined by $X_0=t^{m_0},X_{1}=t^{m_1},X_2=t^{m_3},Y=t^{n}$ is a graded $R$-module, where $R$ is the polynomial ring $k[X_0,X_1,X_3, Y]$ with the grading $°{X_i}:=m_i, °{Y}:=n$. In this paper, we construct a minimal graded free resolution for $k[Γ]$.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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