Faithful tropicalization of the Grassmannian of planes
Faithful tropicalization of the Grassmannian of planes
复制标题
格拉斯曼平面的忠实热带化
DOI:
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发表时间:
2013
期刊:
影响因子:
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通讯作者:
A. Werner
中科院分区:
文献类型:
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作者:
M. Cueto;Mathias Häbich;A. Werner
We show that the tropical projective Grassmannian of planes is homeomorphic to a closed subset of the analytic Grassmannian in Berkovich’s sense by constructing a continuous section to the tropicalization map. Our main tool is an explicit description of the algebraic coordinate rings of the toric strata of the Grassmannian. We determine the fibers of the tropicalization map and compute the initial degenerations of all the toric strata. As a consequence, we prove that the tropical multiplicities of all points in the tropical projective Grassmannian are equal to one. Finally, we determine a piecewise linear structure on the image of our section that corresponds to the polyhedral structure on the tropical projective Grassmannian.