Algebra/Topology Seminar – Patricia Cahn (Smith College)

346 Gordon Palmer Hall 505 Hackberry Lane, Tuscaloosa, AL, United States

Title: Colored Tri-Plane Diagrams and the Slice-Ribbon Problem Abstract: We study dihedral branched covers of the four-dimensional sphere, where the branching set is a surface with one singularity modeled on the cone on a knot K.   We construct examples of these covers using colored tri-plane diagrams, which are triples of tangles that can be used