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Fibers of Rational Maps and Elimination Matrices: An Application Oriented Approach

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Abstract

Parameterized algebraic curves and surfaces are widely used in geometric modeling and their manipulation is an important task in the processing of geometric models. In particular, the determination of the intersection loci between points, pieces of parameterized algebraic curves and pieces of algebraic surfaces is a key problem in this context. In this paper, we survey recent methods based on syzygies and blowup algebras for computing the image and the finite fibers of a curve or surface parameterization, more generally of a rational map. Conceptually, the main idea is to use elimination matrices, mainly built from syzygies, as representations of rational maps and to extract geometric informations from them. The construction and main properties of these matrices are first reviewed and then illustrated through several settings, each of them highlighting a particular feature of this approach that combines tools from commutative algebra, algebraic geometry and elimination theory.

Dedicated to David Eisenbud on the occasion of his seventy-fifth birthday.

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Authors and Affiliations

  1. Université Côte d’Azur, Inria, Sophia Antipolis, France

    Laurent Busé

  2. Institut de Mathématiques de Jussieu, CNRS & Sorbonne Université, Paris, France

    Marc Chardin

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  1. Laurent Busé
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  2. Marc Chardin
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Correspondence to Marc Chardin .

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Editors and Affiliations

  1. Department of Mathematics, Cornell University, Ithaca, NY, USA

    Irena Peeva

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Busé, L., Chardin, M. (2021). Fibers of Rational Maps and Elimination Matrices: An Application Oriented Approach. In: Peeva, I. (eds) Commutative Algebra. Springer, Cham. https://doi.org/10.1007/978-3-030-89694-2_6

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