İstanbul Center for Mathematical Sciences

Surfaces in D^4 with the same boundary and fundamental group
Takahiro Oba
Tokyo Institute of Technology, Japan
Özet : This talk is concerned with symplectic surfaces in a symplectic 4-disk bounded by the same transverse link in the standard contact 3-sphere. There are some examples of transverse links (or knots) bounding more than one symplectic surface up to isotopy. All these surfaces can be distinguished by the fundamental groups of their complements. In this talk, I will present a family of pairs of distinct two symplectic surfaces whose boundaries are the same transverse knot and whose complements have isomorphic fundamental groups. To distinguish the two surfaces of each pair, I take double branched covers branched along them.
  Tarih : 20.11.2018
  Saat : 15:00
  Yer : IMBM, Seminar Room, Boğaziçi University South Campus
  Dil : English