Tropical intersection products on smooth varieties

Details Tropical intersection products on smooth varieties Tropical intersection products on smooth varieties

2009-04-17

arxiv.org/abs/0904.2693v2

Mathematics

Algebraic Geometry

17 pages, 3 figures; some corrections in version 2

Scientific paper

In analogy to chapter 9 of arXiv:0709.3705 we define an intersection product of tropical cycles on tropical linear spaces L^n_k, i.e. on tropical fans of the type max{0,x_1,...,x_n}^(n-k)*R^n. Afterwards we use this result to obtain an intersection product of cycles on every smooth tropical variety, i.e. on every tropical variety that arises from gluing such tropical linear spaces. In contrast to classical algebraic geometry these products always yield well-defined cycles, not cycle classes only. Using these intersection products we are able to define the pull-back of a tropical cycle along a morphism between smooth tropical varieties. In the present article we stick to the definitions, notions and concepts introduced in arXiv:0709.3705.

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