Combinatorics of tropical Hurwitz cycles
Combinatorics of tropical Hurwitz cycles
复制标题
热带赫尔维茨循环的组合
DOI:
10.1007/s10801-015-0615-0
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发表时间:
2015
影响因子:
0.8
通讯作者:
Simon Hampe
中科院分区:
文献类型:
--
作者:
Simon Hampe
We study properties of the tropical double Hurwitz loci defined by Bertram, Cavalieri and Markwig. We show that all such loci are connected in codimension one. If we mark preimages of simple ramification points, then for a generic choice of such points, the resulting cycles are weakly irreducible, i.e. an integer multiple of an irreducible cycle. We study how Hurwitz cycles can be written as divisors of rational functions and show that they are numerically equivalent to a tropical version of a representation as a sum of boundary divisors. The results and counterexamples in this paper were obtained with the help ofa-tint, an extension forpolymakefor tropical intersection theory.
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DOI:
10.1016/j.ejc.2013.10.001
发表时间:
2012
期刊:
Eur. J. Comb.
影响因子:
--
作者:
Simon Hampe
通讯作者:
Simon Hampe
影响因子:
0.9
作者:
Georges François
通讯作者:
Georges François
影响因子:
1.1
作者:
G. François;J. Rau
通讯作者:
J. Rau
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
G. Mikhalkin
通讯作者:
G. Mikhalkin
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
F. Vetro
通讯作者:
F. Vetro