Irreducible Cycles and Points in Special Position in Moduli Spaces for Tropical Curves
Irreducible Cycles and Points in Special Position in Moduli Spaces for Tropical Curves
复制标题
热带曲线模空间中的不可约环和特殊位置点
DOI:
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发表时间:
2011
影响因子:
0.7
通讯作者:
Franziska Schroeter
中科院分区:
文献类型:
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作者:
A. Gathmann;Franziska Schroeter
In the first part of this paper, we discuss the notion of irreducibility of cycles in the moduli spaces of n-marked rational tropical curves. We prove that Psi-classes and vital divisors are irreducible, and that locally irreducible divisors are also globally irreducible for n leq 6. In the second part of the paper, we show that the locus of point configurations in (R^2)^n in special position for counting rational plane curves (defined in two different ways) can be given the structure a tropical cycle of codimension 1. In addition, we compute explicitly the weights of this cycle.