Abstract: In the first part, we review the stable classification program of 4-manifolds using Kreck's modified surgery. In the second part, we will consider smooth spin 4-manifolds whose fundamental group is that of an aspherical, oriented 3-manifold. In this case, we will give a complete set of invariants that determine whether two such manifolds are stably diffeomorphic.
Links:
[1] https://www.mpim-bonn.mpg.de/taxonomy/term/39
[2] https://www.mpim-bonn.mpg.de/node/3444
[3] https://www.mpim-bonn.mpg.de/node/5518