This talk will be the second part of a survey of ideas and results related to the classification of topological 4-manifolds up to homeomorphism or s-cobordism. In this talk I will assume that the fundamental group is infinite, and discuss (i) geometrically 2-dimsnsional groups, (ii) minimal 4-manifolds with a given fundamental group, and (iii) open problems.
http://people.mpim-bonn.mpg.de/teichner/Math/4-Manifolds.html [5]
Links:
[1] http://www.mpim-bonn.mpg.de/taxonomy/term/39
[2] http://www.mpim-bonn.mpg.de/node/3444
[3] http://www.mpim-bonn.mpg.de/node/4617
[4] http://www.mpim-bonn.mpg.de/node/4641
[5] http://people.mpim-bonn.mpg.de/teichner/Math/4-Manifolds.html
[6] http://www.mpim-bonn.mpg.de/sites/default/files/videos/download/20130408_hambleton2a.mp4
[7] http://www.mpim-bonn.mpg.de/sites/default/files/videos/download/20130408_hambleton2b.mp4