# Courses

Date: May 10, 2009
Venue:
11, 18 and 19th May 2009 11'30 am room 1.25

Graded manifolds are "manifolds where some coordinates anticommute".
Among other things, they provide a way to encode well-known
matematical structures in a geometric and concise fashion.
I plan to cover
- how they encode $L_{\infty}$ algebras and Lie algebroids

Date: April 15, 2009
Venue:
Centro de Matemática da Universidade do Porto

15, 16 e 17 de Abril próximo

Em cada um destes dias haverá duas sessões de duas horas

Os slides do curso estão disponíveis na página:

http://web.mac.com/xgviennot/Xavier_Viennot/cours.html

Date: October 15, 2008
Venue:
The course will be held on Wednesdays at 15h, place will be announced.

The aim of the course is to introduce pseudodifferential calculus for Lie groupoids and study the index theory of elliptic such operators.

Date: September 17, 2008
Venue:
Sala 1.02

Lecture 1: 17 September (Wed): 14h30-15h30 (Room 1.02 )

Bundle Theory:

Date: November 28, 2007
Venue:
Department of pure Mathematics, Faculty of Science of the University of Porto

We shall review some results in the theory of Hopf algebras and their tensor categories of representations, putting special emphasis in the classification problem in the semisimple case. We shall discuss the construction of extensions and semisimple Hopf algebras arising from matched pairs of finite groups as well as the more recent construction of group theoretical Hopf algebras.

Date: October 15, 2007
Venue:
Primeira aula no dia 15/10 na sala 0.04, às 14h30. Aulas seguintes no dia 18/10 na sala 1.26, às 14h30 e no dia 19/10 na sala 0.03, às 14h30

Lecture 1 (October 15: 14.30-16.00, Room 0.04) : Moduli and quotients

Date: June 4, 2007
Venue:
Sala 0.05 do edifício das Matemáticas

Sessão 1 - Segunda-feira, 4 de Junho, 14.30-16.00
Classical variational principle and Hausdorff dimension in conformal dynamics

Sessão 2 - Terça-feira, 5 de Junho, 14.30-16.00
Relativized variational principle and Hausdorff dimension in nonconformal dynamics

Date: September 4, 2006
Venue:
Anfiteatro 0:31, Departamento de Matemática Aplicada, FCUP

Mini-curso:

Date: June 7, 2006
Venue:
Anfiteatro 0:30, Departamento de Matemática Aplicada FCUP

Mini curso:
Approximate Solutions of Second Kind Integral Equations

Sessão 1 - Quarta-feira, 7 de Junho, 11h, anf. 0:30
Sessão 2 - Quinta-feira, 8 de Junho, 14 h, anf. 0:30

Date: April 6, 2006
Venue:
Anfiteatro 0.05

A numerical semigroup is a subset of ${\mathbb N}$ closed under addition, containing the zero element, and with finite complement in ${\mathbb N}$. Even though the concept is easy to understand, there are many pro\-blems related to numerical semigroups that remain unsolved.