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arXiv 0904.0178math.AG
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稀疏多项式的代数密切和因式分解

Algebraic osculation and factorization of sparse polynomials

Martin Weimann

摘要:

本文证明了一个代数密切关系定理,并将其应用于多项式分解的计算机代数问题。我们认为X是复平面的光滑完备,D是支撑在X边界上的有效因子.我们的主要结果给出了等价于D上给定的卡地亚因子延伸到X的显式条件。这些密切准则用留数表示。我们从这个结果导出一个复曲面Hensel提升允许计算的二元多项式的绝对因式分解,考虑到几何的牛顿多面体。特别是,我们减少了可能的重组的数量相比,Galligo-Rupprecht算法。

英文摘要:

We prove a theorem on algebraic osculation and we apply our result to the Computer Algebra problem of polynomial factorization. We consider X a smooth completion of the complex plane and D an effective divisor supported on the boundary of X. Our main result gives explicit conditions equivalent to that a given Cartier divisor on D extends to X. These osculation criterions are expressed with residues. We derive from this result a toric Hensel lifting which permits to compute the absolute factorization of a bivariate polynomial by taking in account the geometry of its Newton polytope. In particular, we reduce the number of possible recombinations when compared to the Galligo-Rupprecht algorithm.

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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