Seminars & Colloquia Calendar
Non-simply connected 4-manifolds
Daniel Ruberman (Brandeis)
Location: Hill 705
Date & time: Friday, 28 September 2018 at 4:00PM - 5:00PM
Abstract: A venerable technique to study manifolds of dimension n is to consider invariants of submanifolds of dimension n-1, dual to a 1-dimensional cohomology class. A classic instance of this technique in dimension 4 arises from Rochlinâ€™s theorem about smooth spin 4-manifolds. I will describe what 4-dimensional gauge theory (Seiberg-Witten theory and Yang-Mills theory) tells us about such invariants, and give some applications of this new point of view.