题目：About spaces with the property that every homotopy equivalence can be deformed  to a fixed-point  free map    

报告人：Daciberg Lima Goncalves (University   of  São  Paulo 巴西)    

(joint  work  with  Peter Wong)：    

摘要：Few years ago we discovered a family of space, which are Nilmanifolds (quotient  of  $R^n$ by a nilpotent lattice, like the torus) which have the  property described in the title. These spaces are (K(\pi,1)$(or aspherical).    

We look of the question of to find  new examples  where the spaces at this time no longer are aspherical(i.e. spaces which have the universal covering contractible). We will show a construction of such new examples which consist of the mapping torus of certain lens space.

报告时间：3月21日（周四）上午10:00-12:00

报告地点：教二楼 711

联系人：赵学志