On the degree growth of birational mappings in higher dimension

On the degree growth of birational mappings in higher dimension
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高维双有理映射的度增长

DOI:
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发表时间:
2004
期刊:
影响因子:
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通讯作者:
Kyounghee Kim
Kyounghee Kim
中科院分区:
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文献类型:
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作者:
Eric Bedford;Kyounghee Kim

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设 f 为 Cd 的双有理映射,并考虑度复杂度或渐近度增长率 δ(f) = limn → ∞ (deg(fn))1/n。我们引入了一系列基本映射,其形式为 f = L o J,其中 L 是(可逆)线性的,且 J(x1−1,..., xd) = (x1−1,...,xd−1)。我们开发了一种正则化方法,并展示了它如何能够用于计算基本映射的 δ。
Let ƒ be a birational map of Cd,and consider the degree complexity or asymptotic degree growth rate δ(ƒ) = limn → ∞ (deg(ƒn))1/n.We introduce a family of elementary maps, which have the form ƒ = L o J, where L is (invertible) linear, and J(x1−1,..., xd) = (x1−1,...,xd−1.We develop a method of regularization and show how it can be used to compute δ for an elementary map.