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.
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.