2:00 pm Wednesday, March 13, 2024
Topology Seminar: Infiniteness of 4-dimensional mapping class groups and characteristic classes by Hokuto Konno (University of Tokyo) in PMA 12.166
Many authors discovered special phenomena in dimension 4 that do not occur in other dimensions, but today it has become difficult to find such phenomena in classical problems about exotic structures on manifolds. We present a new special phenomenon in dimension 4 from the point of view of infiniteness of mapping class groups and characteristic classes of fiber bundles. The proof uses a new series of characteristic classes obtained from Seiberg-Witten theory for families. Submitted by
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