Bitangents to plane quartics via tropical geometry: rationality, $$\mathbb {A}^1$$-enumeration, and real signed count
Bitangents to plane quartics via tropical geometry: rationality, $$\mathbb {A}^1$$-enumeration, and real signed count
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通过热带几何到平面四次曲线的双切线:理性、$$mathbb {A}^1$$-枚举和实数有符号数
DOI:
10.1007/s40687-023-00383-1
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发表时间:
2023
影响因子:
1.2
通讯作者:
Shaw, Kris
中科院分区:
文献类型:
--
作者:
Markwig, Hannah;Payne, Sam;Shaw, Kris
We explore extensions of tropical methods to arithmetic enumerative problems such as-enumeration with values in the Grothendieck–Witt ring and rationality over Henselian valued fields, using bitangents to plane quartics as a test case. We consider quartic curves over valued fields whose tropicalizations are smooth and satisfy a mild genericity condition. We then express obstructions to rationality of bitangents and their points of tangency in terms of twisting of edges of the tropicalization; the latter depends only on the tropicalization and the initial coefficients of the defining equation modulo squares. We also show that the-multiplicity of a tropical bitangent, i.e. the multiplicity with which its lifts contribute to the-enumeration of bitangents as defined by Larson and Vogt (Res Math Sci 8(26):1–21, 2021), can be computed from the tropicalization of the quartic together with the initial coefficients of the defining equation. As an application, we show that the four lifts of most tropical bitangent classes contribute, twice the class of the hyperbolic plane, to the-enumeration. These results rely on a degeneration theorem relating the Grothendieck–Witt ring of a Henselian valued field to the Grothendieck–Witt ring of its residue field, in residue characteristic not equal to two.
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影响因子:
1.2
作者:
Larson, Hannah;Vogt, Isabel
通讯作者:
Vogt, Isabel
影响因子:
2.5
作者:
J. Kass;K. Wickelgren
通讯作者:
K. Wickelgren
DOI:
10.5427/jsing.2012.4e
发表时间:
2011
期刊:
arXiv: Algebraic Geometry
影响因子:
--
作者:
Erwan Brugall'e;Luc'ia L'opez de Medrano
通讯作者:
Luc'ia L'opez de Medrano
DOI:
10.1007/978-1-4939-7486-3_4
发表时间:
2015
期刊:
arXiv: Algebraic Geometry
影响因子:
--
作者:
M. Chan;Pakawut Jiradilok
通讯作者:
Pakawut Jiradilok
影响因子:
0.7
作者:
Geiger,Alheydis;Panizzut,Marta
通讯作者:
Panizzut,Marta