# Seminar Event Detail

Colloquium Series

 Date:  Tuesday, April 04, 2017 Location:  1360 East Hall (4:10 PM to 5:00 PM) Title:  Around Grothendieck's theory of dessins d'enfants Abstract:   This will be mainly an expository talk aiming to explain the correspondence introduced by Grothendieck in the 80's between algebraic curves defined over number fields and a certain kind of graphs embedded in compact orientable surfaces that he called designs d'infants (= children's drawings). Towards the end of the talk I will attempt to mention two recent results obtained jointly with Andrei Jaikin-Zapirain concerning the action of the absolute Galois group $Gal(\overline{\mathbb{Q}}/\mathbb{Q})$ on regular dessins and on the topology of algebraic varieties defined over number fields. Files: Speaker:  Gabino Gonzalez-Diez Institution:  Universidad Autonoma de Madrid Event Organizer: