English

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

Commutative Algebra 2016-01-05 v2

Abstract

Let \mm=(m0,m1,m2,n)\mm=(m_0,m_1,m_2,n) be an almost arithmetic sequence, i.e., a sequence of positive integers with gcd(m0,m1,m2,n)=1{\rm gcd}(m_0,m_1,m_2,n) = 1, such that m0<m1<m2m_0<m_1<m_2 form an arithmetic progression, nn is arbitrary and they minimally generate the numerical semigroup Γ=m0N+m1N+m2N+nN\Gamma = m_0\N + m_1\N + m_2\N + n\N. Let kk be a field. The homogeneous coordinate ring k[Γ]k[\Gamma] of the affine monomial curve parametrically defined by X0=tm0,X1=tm1,X2=tm3,Y=tnX_0=t^{m_0},X_{1}=t^{m_1},X_2=t^{m_3},Y=t^{n} is a graded RR-module, where RR is the polynomial ring k[X0,X1,X3,Y]k[X_0,X_1,X_3, Y] with the grading degXi:=mi,degY:=n\deg{X_i}:=m_i, \deg{Y}:=n. In this paper, we construct a minimal graded free resolution for k[Γ]k[\Gamma].

Keywords

Cite

@article{arxiv.1503.02687,
  title  = {Minimal Graded Free Resolution for Monomial Curves in $\mathbb{A}^{4}$ defined by almost arithmetic sequences},
  author = {Achintya Kumar Roy and Indranath Sengupta and Gaurab Tripathi},
  journal= {arXiv preprint arXiv:1503.02687},
  year   = {2016}
}

Comments

Accepted for publication in Communication in Algebra

R2 v1 2026-06-22T08:48:07.827Z