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Geometric Topology Seminar
October 5, 2017 14:00, Moscow, Math Department of the Higher School of Economics, Room 108
 


Weighted transition polynomial as a weight system

Alex Dunaykin

National Research University "Higher School of Economics" (HSE), Moscow

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Abstract: In order to study Vassiliev invariants of knots we may study functions on chord diagrams that satisfy special relations. Such functions are called weight systems. A chord diagram is an oriented ribbon graph with one vertex. We introduce a weight system that is a weighted transition polynomial of the medial graph of a chord diagram. Preise definitions will be given in the beginning of the talk and our weight system will be continued to an arbitrary ribbon graph remaining a weight system.

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