From Pascal's Theorem to the geometry of Ziegler's line arrangements Article Swipe

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YOU? · · 2023 · Open Access · · DOI: https://doi.org/10.48550/arxiv.2312.11928

Günter Ziegler has shown in 1989 that some homological invariants associated with the free resolutions of Jacobian ideals of line arrangements are not determined by combinatorics. His classical example involves hexagons inscribed in conics. Independently, Sergey Yuzvinsky has arrived in 1993 at the same type of line arrangements in order to show that formality is not determined by the combinatorics. In this note we look into the geometry of such line arrangements, and find out an unexpected relation to the classical Pascal's Theorem. Our results give information on the minimal degree of a Jacobian syzygy and on the formality of such hexagonal line arrangements in general, without an explicit choice for the six vertices of the hexagon.

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Mathematics Formality Conic section Hilbert's syzygy theorem Combinatorics Pascal (unit) Algebraic geometry Line (geometry) Geometry Pure mathematics Computer science Programming language Philosophy Linguistics

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Type: preprint
Language: en
Landing Page: http://arxiv.org/abs/2312.11928
PDF: https://arxiv.org/pdf/2312.11928
OA Status: green
Related Works: 10
OpenAlex ID: https://openalex.org/W4390042238

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DOI: https://doi.org/10.48550/arxiv.2312.11928

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Title: From Pascal's Theorem to the geometry of Ziegler's line arrangements

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Type: preprint

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Language: en

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Publication year: 2023

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Publication date: 2023-12-19

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Authors: Alexandru Dimca, Gabriel Sticlaru

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Landing page: https://arxiv.org/abs/2312.11928

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PDF URL: https://arxiv.org/pdf/2312.11928

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Concepts: Mathematics, Formality, Conic section, Hilbert's syzygy theorem, Combinatorics, Pascal (unit), Algebraic geometry, Line (geometry), Geometry, Pure mathematics, Computer science, Programming language, Philosophy, Linguistics

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