Calculating the algebraic entropy of mappings with unconfined singularities

Calculating the algebraic entropy of mappings with unconfined singularities
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计算具有无限制奇点的映射的代数熵

DOI:
10.1093/integr/xyy006
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发表时间:
2018
期刊:
Journal of Integrable Systems
影响因子:
--
通讯作者:
Satsuma J
Satsuma J
中科院分区:
--
文献类型:
--
作者:
Ramani A;Grammaticos B;Willox R;Mase T;Satsuma J

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给出了一种计算具有无限制奇点的映射的动力学度的方法。它是基于Halburd介绍的一种方法,用于计算具有限制奇点的有理映射的迭代的增长。特别是,我们通过几个例子显示如何简单的计算,基于映射的奇异模式,允许一个获得的精确值的动力学程度的不可积映射,不具有奇异限制属性。我们还研究了具有无限制奇点的可线性化映射,以证明在这种情况下,我们的方法确实产生零代数熵。
We present a method for calculating the dynamical degree of a mapping with unconfined singularities. It is based on a method introduced by Halburd for the computation of the growth of the iterates of a rational mapping with confined singularities. In particular, we show through several examples how simple calculations, based on the singularity patterns of the mapping, allow one to obtain the exact value of the dynamical degree for non-integrable mappings that do not possess the singularity confinement property. We also study linearizable mappings with unconfined singularities to show that in this case our method indeed yields zero algebraic entropy.Communicated by: Kenji Kajiwara
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