The Jacobian Conjecture fails for pseudo-planes

The Jacobian Conjecture fails for pseudo-planes
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雅可比猜想对于伪平面失败

DOI:
10.1016/j.aim.2018.09.020
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发表时间:
2017
影响因子:
1.7
通讯作者:
Karol Palka
Karol Palka
中科院分区:
数学1区
文献类型:
--
作者:
A. Dubouloz;Karol Palka

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光滑复簇满足广义Jacobian猜想,如果它的所有étal型自同态都是真的。研究了负对数Kodaira维q-非循环曲面的猜想。证明了无限群G的G-等变反例存在当且仅当G=C-⁎,并将它们与Belyi-Shabat多项式联系起来进行了分类。利用泛覆盖,我们得到了具有非真C⁎等变自同态的负对数Kodaira维的有理单连通C⁎曲面。我们还证明了对于任意的整数r≥1,k≥2,具有基本群Zk和负对数Kodaira维的q-非循环有理超平面u(1+urv)=wk允许任意高维和任意次的非真自同构族,其成员在自同构群的作用下按左右合成除以后仍然不同.
A smooth complex variety satisfies the Generalized Jacobian Conjecture if all its étale endomorphisms are proper. We study the conjecture for Q-acyclic surfaces of negative logarithmic Kodaira dimension. We show that G-equivariant counterexamples for infinite group G exist if and only if G= C⁎ and we classify them relating them to Belyi–Shabat polynomials. Taking universal covers we get rational simply connected C⁎-surfaces of negative logarithmic Kodaira dimension which admit non-proper C⁎-equivariant étale endomorphisms. We prove also that for every integers r≥ 1, k≥ 2 the Q-acyclic rational hyperplane u (1+ u r v)= w k, which has fundamental group Z k and negative logarithmic Kodaira dimension, admits families of non-proper étale endomorphisms of arbitrarily high dimension and degree, whose members remain different after dividing by the action of the automorphism group by left and right composition.
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DOI: --
发表时间: 2022
期刊:
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作者:
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发表时间: 2007
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