Tabulation of cubic function fields via polynomial binary cubic forms

Author:

Rozenhart Pieter,Jr. Michael Jacobson,Scheidler Renate

Abstract

We present a method for tabulating all cubic function fields over F q ( t ) \mathbb {F}_q(t) whose discriminant D D has either odd degree or even degree and the leading coefficient of 3 D -3D is a non-square in F q \mathbb {F}_{q}^* , up to a given bound B B on deg ( D ) \deg (D) . Our method is based on a generalization of Belabas’ method for tabulating cubic number fields. The main theoretical ingredient is a generalization of a theorem of Davenport and Heilbronn to cubic function fields, along with a reduction theory for binary cubic forms that provides an efficient way to compute equivalence classes of binary cubic forms. The algorithm requires O ( B 4 q B ) O(B^4 q^B) field operations as B B \rightarrow \infty . The algorithm, examples and numerical data for q = 5 , 7 , 11 , 13 q=5,7,11,13 are included.

Publisher

American Mathematical Society (AMS)

Subject

Applied Mathematics,Computational Mathematics,Algebra and Number Theory

Cited by 4 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Cubic function fields with prescribed ramification;International Journal of Number Theory;2021-04-20

2. Computing quadratic function fields with high 3-rank via cubic field tabulation;Rocky Mountain Journal of Mathematics;2015-12-01

3. Construction of all cubic function fields of a given square-free discriminant;International Journal of Number Theory;2015-08-26

4. Constructing and tabulating dihedral function fields;The Open Book Series;2013-11-14

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