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Classifying fibered, homotopy-ribbon disks


Speaker: Jeffrey Meier, Western Washington University
Location: 2112 & Zoom
Start time: Tue, Nov 23 2021, 4:10PM

I will discuss the classification of fibered, homotopy-ribbon disks bounded by generalized square knots. Up to diffeomorphism rel-boundary, such disks are in bijection with the rational numbers with even numerator. However, there is a unique such disk up to diffeomorphism. This is joint work with Alex Zupan.