Enhancing the extended hensel construction by using Gröbner basis

Enhancing the extended hensel construction by using Gröbner basis
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使用 Gröbner 基础增强扩展的 hensel 结构

DOI:
10.1145/3096730.3096737
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发表时间:
2017
期刊:
ACM Commun. Comput. Algebra
影响因子:
--
通讯作者:
D. Inaba
D. Inaba
中科院分区:
--
文献类型:
--
作者:
Tateaki Sasaki;D. Inaba

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与一般Hensel构造(GHC:[3])使用单变量初始Hensel因子相反,扩展Hensel构造(EHC:[8])使用由给定多元多项式<i>F(x,<b>u</b>)</i>∈ K[<i>x</i>,<b><i>u</i></b>]的牛顿多边形(见下文)确定的多元初始Hensel因子,其中(<b><i>u</i></b>)=(<sub>u1</sub>,...,<i></i><i>u</i><i><sub>)</sub></i>,其中<i>k</i>≥ 2,K是数域。<i>F</i>(<i>x,<b>u</b></i>)可以使得其前导系数可以在(<b><i>u</i></b>)=(<b>0</b>)=(0,.,0),并且甚至可以是<i>F</i>(<i>x</i>,<b>0</b>)= 0。到目前为止,EHC用于计算由<i>F</i>(<i>x,<b>u</b></i>)= 0确定的多元代数函数在临界点的级数展开[8,5]以及<i>F</i>(<i>x</i>,<b><i>u</i></b>)的因子分解[4,1]和GCD计算[7],而不移动<b><i>u</i></b>的原点。它使我们能够构造有效的算法稀疏多元多项式[1,7]。EHC是另一种比Zippel稀疏Hensel提升更有前途的方法[9,10]。
Contrary to that the general Hensel construction (GHC: [3]) uses univariate initial Hensel factors, the extended Hensel construction (EHC: [8]) uses multivariate initial Hensel factors determined by the Newton polygon (see below) of the given multivariate polynomial <i>F (x, <b>u</b>)</i> ∈ K[<i>x</i>, <b><i>u</i></b>], where (<b><i>u</i></b>) = (<i>u</i><sub>1</sub>,...,<i>u</i><i><sub>ℓ</sub></i>), with <i>ℓ</i> ≥ 2, and K is a number field. The <i>F</i>(<i>x, <b>u</b></i>) may be such that its leading coefficient may vanish at (<b><i>u</i></b>) = (<b>0</b>) = (0,...,0), and even may be <i>F</i>(<i>x</i>, <b>0</b>) = 0. The EHC was used so far for computing series expansion of multivariate algebraic function determined by <i>F</i>(<i>x, <b>u</b></i>) = 0, at critical points [8, 5] and for factorization [4, 1] and GCD computation [7] of <i>F</i>(<i>x</i>, <b><i>u</i></b>), without shifting the origin of <b><i>u</i></b>. It allows us to construct efficient algorithms for sparse multivariate polynomials [1, 7]. The EHC is another and promising approach than Zippel's sparse Hensel lifting [9, 10].
DOI: --
发表时间: 2008
期刊:
影响因子: --
作者:
M.Hino;T.Kumagai;T. Sasaki
通讯作者: T. Sasaki