为促进意昂4与国内特别是华东地区拓扑学的交流合作❎，我们将于9月15日在意昂4娱乐举办“2019华东地区拓扑学研讨会”。

日程表

时间🙅：2019年9月15日

地点：意昂4娱乐宁静楼115室

9🔖：00-10：00：胡文传 （四川大学） （主持人➙：邱瑞锋）

题目🦴：The Euler Number of a $C^*$-action Equivariant Embedding into Projective Spaces

摘要：We will talk about an upper bound of the Euler number of a projective variety $C^*$ equivariantly embedded into a complex projective space in the case that the fixed point set of the variety is isolated, proposed by Carrell and Sommese.

10：30-11：30：杨文元 （北京大学）（主持人：王宏玉）

题目：Martin Boundary of Random Walks on Groups

摘要🚴🏽🏄🏽‍♂️：我们将介绍群上的随机游走的基本概念和理论，侧重于带非正曲率的群的Possion边界和Martin边界的确定问题。我们将介绍双曲群，相对双曲群的已知的结果🧖🏻‍♀️，以及正在进行的带收缩元素的群的一些相关工作介绍。

15🧎🏻‍♀️‍➡️：00-16：00：赵学志 （首都师范大学）（主持人👩‍🎤：吕志）

题目：Geometric Intersection Numbers of Loops on Surfaces

摘要：Given two loops on a compact surfaces $F$, it is natural to ask: what is their minimal intersection number during homotopy classes? This number is usually said to be the geometric intersection number. In this talk, we shall explain a way to determine the geometric intersection and self-intersection numbers of loops on surfaces. Our integration are Nielsen fixed point theory and Gr/"{o}bner-Shirsov basis. We illustrate an application: An algorithm to compute the distance of loops in curve complex. This is a joint work with Gu Ying.

16🔥：30-17：30：王宏玉 （扬州大学）（主持人：张影）

题目：On Calabi-Yau Equation on Closed Symplectic Manifolds

摘要🏐：In this talk, we deal with the complex Monge-Ampere equation proposed by Gromov on closed almost Kahler manifolds and extend to arbitrary dimension a non-existence result proved in complex dimension 2. Also we consider Calabi-Yau equation on closed symplectic manifolds.