Four-manifolds and their invariants

任课教师 Speaker:Vasily Manturov
时间 Time: 每周五15:20-16:55,2019-7-26 ~ 9-27
地点 Venue:清华大学近春园西楼第三会议室

课程描述 Description

I will mainly follow the book by Alexandru Scorpan with a possible addition of the work by Fintushel and Stern. I will start from h-cobordism theorem by Smale and the work of Freedman.
After that I will classify quadratic forms and discuss the results of Rokhlin and give explicit examples of non-smoothable manifolds. At the end I will present smooth 4-manifolds   having different smooth structures.

Lecture 1. The Poincare conjecture for dimensions \ge 5.
Lecture 2. Topological 4-manifolds and h-cobordisms.
Casson's handles. Freedman's theorem.
Lecture 3. The intersection form. Signatures. The K3 surface.
Lecture 4. The Whitehead theorem (intersection form defines the
homotopy type of simply connected 4-manifolds).
Lecture 5. Rokhlin's theorem.
Lecture 6. The canonical class. Serre classification of forms.
Lecture 7. Topological classifiaction due to Freedman. Non-realisability of forms by
smooth manifolds. Exotic R^{4}.
Lecture 8. Donaldson's invariants.
Lecture 9. Seiberg-Witten invariants.

预备知识 Prerequisites

Basics of algebra, basics of topology, possibly, some knot theory

参考资料 References

[1] A.Scorpan, The wild world of 4-manifolds;
[2] V.O. Manturov, I.M. Nikonov, “On Braids and Groups G_n^k”, Journal of Knot Theory and Its Ramifications, 24:10 (2015), 16 pp.