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Infiniteness of 4-dimensional mapping class groups and characteristic classes

Topology Seminar

Infiniteness of 4-dimensional mapping class groups and characteristic classes

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Hokuto Konno, MIT & Tokyo University
Fine Hall 314

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.