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arXiv 0704.1747math.NTmath.AG
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用单位根解代数方程

Solving algebraic equations in roots of unity

Iskander Aliev, Chris Smyth

摘要:

本文讨论了多项式方程的单位根问题。它是由S。Lang提出并证明了M. Laurent指出,所有这样的解都可以用一个称为最大挠率陪集的参数族来描述。我们得到了复代数$n$ -环面${\mathbb G}_{\rm m}^n$的代数子簇上的最大挠陪集个数的新的显式上界。与以前的工作,给出了在最大全次数的定义多项式的多项式增长的界限,我们的结果的证明是建设性的。这使我们能够获得一个新的算法来确定最大挠陪集上的代数子簇${\mathbb G}_{\rm m}^n$。

英文摘要:

This paper is devoted to finding solutions of polynomial equations in roots of unity. It was conjectured by S. Lang and proved by M. Laurent that all such solutions can be described in terms of a finite number of parametric families called maximal torsion cosets. We obtain new explicit upper bounds for the number of maximal torsion cosets on an algebraic subvariety of the complex algebraic $n$-torus ${\mathbb G}_{\rm m}^n$. In contrast to earlier works that give the bounds of polynomial growth in the maximum total degree of defining polynomials, the proofs of our results are constructive. This allows us to obtain a new algorithm for determining maximal torsion cosets on an algebraic subvariety of ${\mathbb G}_{\rm m}^n$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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