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arXiv 2603.09445math.DSmath.CV
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复Hénon映射的乘子刚性

Multiplier rigidity for complex Hénon maps

Sorbonne Université, CNRS, Laboratoire de Probabilités, Statistique et Modélisation (LPSM)(索邦大学,法国国家科学研究中心,概率、统计与建模实验室)

Serge Cantat, Romain Dujardin

AI总结:

复Hénon映射的乘子刚性问题,通过乘子谱或不稳定乘子确定,且在多次数和多Jacobian固定时保持刚性。

摘要:

我们研究了多项式自同构的乘子刚性问题。一个结果指出,给定次数的复Hénon映射由其乘子谱,或更一般地由其鞍点周期点的不稳定乘子所确定。这在该设定中对应于McMullen在一维有理映射中的经典结果。对于Hénon映射的复合,只要多次数和多Jacobian固定,同样成立刚性。正如McMullen定理一样,这源于相应参数空间中稳定代数族的不存在。这又依赖于最大熵测度的Lyapunov指数在发散族中的精确渐进行为的界。

英文摘要:

We investigate the multiplier rigidity problem for polynomial automorphisms of $\mathbf{C}^2$. A first result states that a complex Hénon map of given degree is determined up to finitely many choices by its multiplier spectrum, or more generally by the unstable multipliers of its saddle periodic points. This is the counterpart in this setting of a classical result of McMullen for one-dimensional rational maps. For compositions of Hénon maps, the same rigidity holds provided the multi-degree and the multi-Jacobian are fixed. As in McMullen's theorem, this follows from the nonexistence of stable algebraic families in the corresponding parameter space. This in turn relies on precise asymptotic bounds for the Lyapunov exponents of the maximal entropy measure along diverging families.

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