MaPhySto
Centre for Mathematical Physics and Stochastics
Department of Mathematical Sciences, University of Aarhus

## Vassiliev invariants, chord diagrams, the Kontsevich integral, the structure of the algebra of Feynman diagrams, and the universal Lie algebra

### University of Aarhus

In the above-mentioned period, MaPhySto organized Concentrated Advanced Course on these topics within the area of geometric mathematical physics. The course took place at the Department of Mathematical Sciences, University of Aarhus.

### Course Contents

Vassiliev theory:
Invariants of knots or links, Vassiliev invariants, singular links and chord diagrams. The Vassiliev filtration on the space of links and its relation with the module of chord diagrams.
Trivalent Feynman diagrams:
The AS and IHX relations. Basic facts about modules of trivalent diagrams ${\cal A}(\Gamma,X)$.
The Kontsevich integral:
Description of the integral. The isomorphism (after completion) between the modules of knots and the graded modules of trivalent diagrams ${\cal A}(S^1,\emptyset)$.
Structure of the module ${\cal A}(\Gamma,X)$:
Coalgebra structure and functoriality. The algebra $\Lambda$ and its action on modules of diagrams. Weight functions coming from Lie algebras. The height characters corresponding to all Lie algebras and Lie superalgebras.
The universal Lie algebra:
Construction of this universal object. Known facts and conjectures about it: the category of representations, simple modules and their dimensions.

### Schedule

Time Tuesday Wednesday ThursdayFriday
9.15-10.15 registration
10.15-11.00 Lectures Lectures Lectures Exercises
11.15-12.00 Lectures Lectures Lectures Exercises
LUNCH (from 12.30)
14.15-15.00 Lectures Exercises Lectures
15.15-16.00 Lectures Exercises Lectures Lectures
16.15-17.00 Lectures

### Lecture notes

The lecture notes for the course may be down-loaded in [ postscript | pdf ] format.

### List of participants

 Bedia Akyar (Aarhus) Jørgen Ellegaard Andersen (Aarhus) William Browder (Princeton) Marcel Bökstedt (Aarhus) Johan Dupont (Aarhus) Jakob Grove (Aarhus) Søren Have Hansen (MaPySto, Aarhus) Søren Kold Hansen (Aarhus) Lars Hesselholt (MIT) Herbert Lee (MaPySto, Copenhagen) Ib Madsen (Aarhus) Takuro Mochizuki (Osaka) Tetsuhiro Moriyama (RIMS, Kyoto) Maciej Mroczkowski (Uppsala) Holger Andreas Nielsen (Aarhus) Henrik Hald Nørgaard (Aarhus) Anders Skov (Aarhus) Erik Skibsted (Aarhus) Jørgen Tornehave (Aarhus) Pierre Vogel (Paris VII) Henrik Vosegaard (Aarhus)

### More Information

Do not hesitate to contact the MaPhySto secretariat (at maphysto@maphysto.dk) or the local organizer Jørgen Ellegaard Andersen for further information.

This document, http://www.maphysto.dk/oldpages/events/VogelCAC2000/index.html, was last modified January 19, 2004. Questions or comments to the contents of this document should be directed to maphysto@maphysto.dk.