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:
影响因子:
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通讯作者:
D. Inaba
中科院分区:
文献类型:
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作者:
Tateaki Sasaki;D. Inaba
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:
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发表时间:
2008
期刊:
影响因子:
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作者:
M.Hino;T.Kumagai;T. Sasaki
通讯作者:
T. Sasaki