Swiss Knots 2011

Knot Theory and Algebra

Lake Thun, May 23-27

An Involution on Positive Braids

Sebastian Baader's talk
Date: 27.05.11   Time: 11.20 - 12.10   Room: Gwatt Zentrum

Abstract: The fibre surfaces of torus links retract on complete bipartite Legendrian graphs. By considering subgraphs of these, we obtain retracts for all positive surfaces. This gives rise to a curious involution on strongly quasipositive braids, generalising the well-known duality on standard torus link diagrams.