Betti maps, Pell equations in polynomials and almost-Belyi maps
Betti maps, Pell equations in polynomials and almost-Belyi maps
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Betti 映射、多项式 Pell 方程和近 Belyi 映射
DOI:
10.1017/fms.2022.77
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Barroero F
中科院分区:
文献类型:
--
作者:
Barroero F
We study the Betti map of a particular (but relevant) section of the family of Jacobians of hyperelliptic curves using the polynomial Pell equation , with and certain ramified covers arising from such equation and having heavy constrains on their ramification. In particular, we obtain a special case of a result of André, Corvaja and Zannier on the submersivity of the Betti map by studying the locus of the polynomials D that fit in a Pell equation inside the space of polynomials of fixed even degree. Moreover, Riemann existence theorem associates to the abovementioned covers certain permutation representations: We are able to characterize the representations corresponding to ‘primitive’ solutions of the Pell equation or to powers of solutions of lower degree and give a combinatorial description of these representations when D has degree 4. In turn, this characterization gives back some precise information about the rational values of the Betti map.
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影响因子:
1.8
作者:
Barroero F
通讯作者:
Barroero F
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
U. Zannier
通讯作者:
U. Zannier
影响因子:
1.3
作者:
Harry Schmidt
通讯作者:
Harry Schmidt
DOI:
--
发表时间:
1973
期刊:
影响因子:
--
作者:
M. Fried
通讯作者:
M. Fried
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
V. Burskii;A. Zhedanov
通讯作者:
A. Zhedanov