大连理工大学数学科学学院
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The rigidity of irrational pseudo-rotations on the two-torus

2017年08月25日 13:39  点击:[]

报告题目:The rigidity of irrational pseudo-rotations on the two-torus

报告人:王俭  南开大学陈省身数学研究所

报告时间:20178 28日(星期一)上午1030-1130

报告地点:创新园大厦A1101

校内联系人:王文栋   联系电话:84708351-8139

 摘要:

In this talk,  we show that under certain boundedness condition, a Cr  conservative irrational pseudo-rotations on T2with a generic rotation vector  is Cr-1-rigid. These provide a partial generalization of the main results in [B. Bramham, Invent. Math. (2015); A. Avila, B. Fayad, P. Le Calvez, D. Xu and Z. Zhang, arXiv: 1509.06906v1]. Furthermore, we construct a C conservative totaly irrational pseudo-rotation with a super-Liouvillean vector and bounded mean motion that is not conjugate to an irrational rotation by the classical Anosov-Katok method.  Combining with a theorem of Jäger, we give a negative answer to a longstanding question of A. Norton and D. Sullivan in the C category.

报告人介绍:

王俭,2012年获得巴黎第十三大学-清华大学联合培养博士学位,2012-2014在南开大学陈省身数学研究所做博士后, 2014-2017在南开大学陈省身数学研究所-德国马普所做联合培养博士后。目前研究兴趣主要集中在动力系统以及辛几何。曾获清华大学优秀博士学位论文一等奖。目前在国际知名杂志Proc. Amer. Math. Soc. , Trans. Amer. Math. Soc. 发表多篇论文。

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