Varieties of tropical ideals are balanced
Varieties of tropical ideals are balanced
复制标题
热带理想的多样性是平衡的
DOI:
10.1016/j.aim.2022.108713
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发表时间:
2022
影响因子:
1.7
通讯作者:
Maclagan D
中科院分区:
文献类型:
--
作者:
Maclagan D
Tropical ideals, introduced in [12], define subschemes of tropical toric varieties. We prove that the top-dimensional parts of their varieties are balanced polyhedral complexes of the same dimension as the ideal. This means that every subscheme of a tropical toric variety defined by a tropical ideal has an associated class in the Chow ring of the toric variety. A key tool in the proof is that specialization of variables in a tropical ideal yields another tropical ideal; this plays the role of hyperplane sections in the theory. We also show that elimination theory (projection of varieties) works for tropical ideals as in the classical case. The matroid condition that defines tropical ideals is crucial for these results.
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