Tropical Resultants for Curves and Stable Intersection

Details Tropical Resultants for Curves and Stable Intersection Tropical Resultants for Curves and Stable Intersection

2008-05-09

arxiv.org/abs/0805.1305v1

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

Mathematics

Algebraic Geometry

22 pages, 1 figure. To appear in the Revista Matem\'atica Iberoamericana

Scientific paper

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.

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