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arXiv 1601.01210math.AGmath.AC
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关于一些好的多项式自同构

On some nice polynomial automorphisms

Elzbieta Adamus, Pawel Bogdan, Teresa Crespo, Zbigniew Hajto

摘要:

给定域K上n维仿射空间的一个多项式自同态F,定义了与F相联系的仿射空间的多项式自同态序列.如果存在一个整数m使得序列的第m项为零,我们称F为好的。则F是可逆的,并且它的逆可以根据序列中的自同态来计算。本文研究了优美多项式自同构类,得到了这类自同构是一个大类,它包括可三角化的自同构和幂零指数不超过3的线性三次齐次多项式自同构。我们还证明了精确性在线性共轭下是不变的,并确定了4维三次齐次自同构的Hubbers分类的8种形式中有7种是好的,而且第8种是好映射的合成。

英文摘要:

Given a polynomial endomorphism F of the n-dimensional affine space over a field K, we define a sequence of polynomial endomorphisms of the affine space associated to F. We call F nice if there exists an integer m such that the m-th term of the sequence vanishes. Then F is invertible and its inverse may be computed in terms of the endomorphisms in the sequence. In this paper we study the class of nice polynomial automorphisms and obtain that this class is large and includes triangulable automorphisms and all linear cubic homogeneous polynomial automorphisms of nilpotence index up to 3. We prove as well that the nicety property is invariant under linear conjugation and determine that seven of the eight forms in Hubbers' classification of cubic homogeneous automorphisms in dimension 4 are nice and moreover the eighth one is a composition of nice maps.

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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