Revista Matemática Iberoamericana

Tropical resultants for curves and stable intersection

Luis Felipe Tabera

Source: Rev. Mat. Iberoamericana Volume 24, Number 3 (2008), 941-961.

Abstract

We introduce the notion of resultant of two planar curves in the tropical geometry framework. We prove that the tropicalization of the algebraic resultant can be used to compute the stable intersection of two tropical plane curves. It is shown that, for two generic preimages of the curves to an algebraic framework, their intersection projects exactly onto the stable intersection of the curves. It is also given sufficient conditions for such a generality in terms of the residual coefficients of the algebraic coefficients of defining equations of the curves.

Primary Subjects: 14M25, 14H50, 52B20
Keywords: tropical geometry; resultants; plane curves

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Links and Identifiers

Permanent link to this document: http://projecteuclid.org/euclid.rmi/1228834299
Mathematical Reviews number (MathSciNet): MR2490204
Zentralblatt MATH identifier: 05509268

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