Journée-séminaire de combinatoire

(équipe CALIN du LIPN, université Paris-Nord, Villetaneuse)

Le 02 avril 2013 à 10h30 en B107, Valentin Bonzom nous parlera de : Invariants of cellular complexes from twisted cohomology and the Reidemeister torsion

Résumé : Cellular complexes are often used in physics as discretizations of spacetime. An interesting class of amplitudes associated to those complexes are topological invariants. I will present a simple model which relates an integral over some Lie group elements associated to the edges of the complex to the so called combinatorial, or Reidemeister torsion of the complex.

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