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Abstracts for Working group on Grothendieck-Teichmüller groups

Alternatively have a look at the program.

First meeting/Working group on Grothendieck-Teichmüller groups

Posted in
Datum: 
Fre, 2018-09-21 14:00 - 15:00
Location: 
MPIM Seminar Room

Concerning the working group on Grothendieck-Teichmuller, I suggest that
we meet  this/Friday 21/09/2018 at 14h00,/ in the /seminarraum./ 
We shall discuss how we organize our group. 

The idea of this working group is to have an exchange of points of views
concerning a tool which connects both geometric and arithmetic areas. 
People who do not necessarily want to give a talk, are also welcome.

Noémie Combe


      

Introduction to the paper of Y. Ihara on automorphisms of pure sphere braid groups, I

Posted in
Speaker: 
Danica Kosanovic and Gautier Ponsinet
Zugehörigkeit: 
MPIM
Datum: 
Don, 2018-09-27 16:30 - 19:00
Location: 
MPIM Lecture Hall

1) This is a seminar for topology/geometry and Arithmetics (number theory).

2) Aim: One of the aims of the working group is to understand the
theorem that states the existence of an injection from the absolute
Galois group Gal(\bar(Q)/Q) into the profinite version of the
Grothendieck -Teichmuller group.

Introduction to the paper of Ihara « Automorphisms of Pure Sphere Braid groups and Galois representations II

Posted in
Speaker: 
Gautier Ponsinet
Zugehörigkeit: 
MPIM
Datum: 
Don, 2018-10-04 16:30 - 19:00
Location: 
MPIM Lecture Hall
Gautier Ponsinet will continue the part 2 of his talkconcerning the definition and properties of the absolute Galois group of a field, the fundamental group of a topological space, and
the étale fundamental groups of schemes, which link the two previous objects.
Examples will be provided and discussed.
 
After his talk, an open discussion (debriefing and round table discussion) will take place.

Presentation of the topological aspect of Ihara’s paper

Posted in
Speaker: 
Danica Kosanovic
Zugehörigkeit: 
MPIM
Datum: 
Don, 2018-10-11 16:30 - 19:00
Location: 
MPIM Seminar Room

Danica Kosanovic will continue the presentation of the topological aspect of Ihara’s paper. 

Presentation of number theory aspects of Ihara's paper

Posted in
Speaker: 
Alexander Betts
Zugehörigkeit: 
MPIM
Datum: 
Don, 2018-10-18 16:30 - 19:00
Location: 
MPIM Seminar Room

Belyi's theorem/dessin d'enfant

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Speaker: 
Boulos El Hilany
Zugehörigkeit: 
MPIM
Datum: 
Don, 2018-10-25 16:30 - 19:00
Location: 
MPIM Seminar Room

Belyi theorem-part 2

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Speaker: 
Campbell Weeler
Zugehörigkeit: 
MPIM
Datum: 
Fre, 2018-11-02 10:30 - 12:30
Location: 
MPIM Lecture Hall

Introduction to the Grothendieck-Teichmüller group

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Speaker: 
Joost Nuiten
Zugehörigkeit: 
Universiteit Utrecht/MPIM
Datum: 
Fre, 2018-11-09 10:30 - 12:00
Location: 
MPIM Lecture Hall

Drinfeld’s quasi triangular quasi Hopf algebras and the Grothendieck-Teichmüller group

Posted in
Speaker: 
Noémie Combe
Zugehörigkeit: 
MPIM
Datum: 
Fre, 2018-11-16 10:30 - 12:30
Location: 
MPIM Lecture Hall

The Grothendieck-Teichmüller Lie algebra and related subjects

Posted in
Speaker: 
Hisatoshi Kodani
Zugehörigkeit: 
MPIM
Datum: 
Fre, 2018-11-23 13:00 - 14:30
Location: 
MPIM Seminar Room
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