The Tropicalj-Invariant
The Tropicalj-Invariant
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热带j不变
DOI:
10.1112/s1461157000001522
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发表时间:
2008
期刊:
影响因子:
--
通讯作者:
Thomas Markwig
中科院分区:
文献类型:
--
作者:
Eric Katz;H. Markwig;Thomas Markwig
If (Q,A) is a marked polygon with one interior point, then a general polynomial f in K[x,y] with support A defines an elliptic curve C on the toric surface X_A. If K has a non-archimedean valuation into the real numbers we can tropicalize C to get a tropical curve Trop(C). If the Newton subdivision induced by f is a triangulation, then Trop(C) will be a graph of genus one and we show that the lattice length of the cycle of that graph is the negative of the valuation of the j-invariant of C.