首页> 外文期刊>Transactions of the American Mathematical Society >AUTOMORPHISM GROUPS OF POSITIVE ENTROPY ON PROJECTIVE THREEFOLDS
【24h】

AUTOMORPHISM GROUPS OF POSITIVE ENTROPY ON PROJECTIVE THREEFOLDS

机译:射影三重正熵的自同构群

获取原文
获取原文并翻译 | 示例
           

摘要

We prove two results about the natural representation of a group G of automorphisms of a normal projective threefold X on its second cohomology. We show that if X is minimal, then G, modulo a normal subgroup of null entropy, is embedded as a Zariski-dense subset in a semi-simple real linear algebraic group of real rank ≤ 2. Next, we show that X is a complex torus if the image of G is an almost abelian group of positive rank and the kernel is infinite, unless X is equivariantly non-trivially fibred.
机译:我们证明了关于正投影三倍X的第二同调的G群自同构的自然表示的两个结果。我们证明,如果X最小,则以零熵的正常子组为模的G会作为Zariski-密集子集嵌入在实秩≤2的半简单实线性代数组中。接下来,我们证明X是a如果G的图像是几乎一个正秩的阿贝尔群,并且核是无限的,则复环面,除非X等价地被平凡地平凡地纤维化。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号