E. Emtander

  1. Componentwise linearity of ideals arising from graphs.

    Authors: V. Crispin Quinonez, E. Emtander
    Subjects: Commutative Algebra
    Abstract

    Let $G$ be a simple undirected graph on $n$ vertices. Francisco and Van Tuyl
    have shown that if $G$ is chordal, then $\bigcap_{\{x_i,x_j\}\in E_G} <
    x_i,x_j>$ is componentwise linear. A natural question that arises is for which
    $t_{ij}>1$ the ideal $\bigcap_{\{x_i,x_j\}\in E_G}< x_i, x_j>^{t_{ij}}$ is
    componentwise linear, if $G$ is chordal. In this report we show that
    $\bigcap_{\{x_i,x_j\}\in E_G} < x_i, x_j>^{t}$ is componentwise linear for all
    $n\geq 3$ and positive $t$, if $G$ is a complete graph.

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