Univariate polynomials and braids. Planar trees and bivariate polynomial mappings with two critical values

Seminario congiunto Dipartimento di Matematica – Centro Internazionale per la Ricerca Matematica (CIRM)

Luogo: Dipartimento di Matematica, via Sommarive, 14 - Povo (TN) - Aula Seminari
Ore 16:30

Relatori:

• Norbert A'Campo (Universita' di Basel)
  (assieme ai proff. Papadopoullos (Strasbourg) e Yamada (Tokyo) partecipa ad un programma di Research in Pairs presso il CIRM)

Abstract: 
In the first part, which is work together with Noémie Combe, an explicit cell decomposition for the braid groups will be presented.
Planar graphs give by monodromy special elements in the mapping class group. The case of planar trees leads to very special mapping class elements on which the absolute Galois group acts.

Referente: Marco Andreatta