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Geometric Topology Seminar
May 17, 2018 14:00–16:50, Moscow, Math Department of the Higher School of Economics, Room 108
 


Invariants on Hopf algebra of delta-matroids and Hopf algebra of Lagrangian subspaces that satisfy four-term relations

V. I. Zhukov

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Abstract: In this talk I will continue the topic Alex Dunaykin spoke about. I will briefly recall the connection between Hopf algebras of chord diagrams, intersection graphs, ribbon (embedded) graphs and binary delta-matroids. I will give some examples of weight systems on the Hopf algebra of delta-matroid. And then I will describe isomorphism between Hopf algebra of ribbon graphs and Hopf algebra of Lagrangian subspaces.

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