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Characteristic Varieties for a Class of Line Arrangements
Published online by Cambridge University Press: 20 November 2018
Abstract
Let $\mathcal{A}$ be a line arrangement in the complex projective plane
${{\mathbb{P}}^{2}}$, having the points of multiplicity
$\ge \,3$ situated on two lines in
$\mathcal{A}$, say
${{H}_{0}}$ and
${{H}_{\infty }}$. Then we show that the non-local irreducible components of the first resonance variety
${{\mathcal{R}}_{1}}(\mathcal{A})$ are 2-dimensional and correspond to parallelograms
$P$ in
${{\mathbb{C}}^{2}}={{\mathbb{P}}^{2}}\text{ }\backslash \text{ }{{H}_{\infty }}$ whose sides are in
$\mathcal{A}$ and for which
${{H}_{0}}$ is a diagonal.
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- Research Article
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- Copyright © Canadian Mathematical Society 2011
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