Short Course: An introduction to the geometry of integrable Hamiltonian systems

Speaker: Daniele Sepe

New Dates: Oct 20: 09h-11h; Oct 22, 29, 30: 11h-13h (Brasilia Time).

To subscribe: please E-mail This email address is being protected from spambots. You need JavaScript enabled to view it..

Syllabus: An important question in Hamiltonian mechanics is to describe qualitative properties of the dynamics under consideration. In general, this is a hard problem but it can be tackled for those systems that are known to be integrable, i.e. that admit the "largest number" of constants of motion. In spite of their relatively simple dynamical behaviour, integrable Hamiltonian systems play a prominent role in Hamiltonian mechanics and beyond, ranging from symplectic geometry and Lie theory to quantum mechanics.

The aim of this course is to provide an introduction to the geometry of such systems from a symplectic perspective. After introducing the necessary tools from symplectic geometry, we will study the structure of integrable Hamiltonian systems near regular points and regular (connected components of) fibres, proving the Darboux-Carathéodory and the Liouville-Arnol'd theorems. The theory will be illustrated by some (simple) examples.

Possible extra topics (if time permits and/or the course is extended to 18 hours): Lagrangian fibrations and their global invariants, an introduction to singular orbits and fibres of integrable systems, the local and global geometry of non-commutative integrable Hamiltonian systems.

This is a joint course with Università di Verona, and it will be taught remotely and in English.


Grupo de Trabalho: Análise Topológica de Dados (Session #5)

Speaker: Paulo Gusmão, UFF.

Date: 22 oct 2020, 16h.

Place: contact organizer at This email address is being protected from spambots. You need JavaScript enabled to view it..

Abstract: Neste grupo de trabalho nos reuniremos para estudar trabalhos relevantes sobre Análise Topológica de Dados, tanto na parte teórica como aplicada.

Neste encontro, continuaremos discutindo o artigo de Facundo Mémoli e Osman Berat Okutan intitulado "Quantitative Simplification of Filtered Simplicial Complexes" Nesse trabalho é apresentado um novo invariante definido nos vértices de um dado complexo simplicial filtrado, chamado condensidade, que controla o impacto de se remover vértices em homologia persistente. O trabalho se concentra na filtração de Vietoris-Rips.


Seminars 2020

Brazilian Algebraic Geometry Seminar

Weekly on Wednesdays, 15h30m, online via Google Meet. See event's website.

Organizers: Carolina Araujo e Eduardo Esteves (IMPA), Ethan Cotterill e Marco Pacini (UFF), Maurício Corrêa e Renato Vidal Martins (UFMG), Marcos Jardim (UNICAMP).

Cibercoloquio Latinoamericano de Matemáticas

Fridays, 14h-15h, online via Webex: see event's site.

Contact at UFF: This email address is being protected from spambots. You need JavaScript enabled to view it..

Organizers: Daniel Campos Salas (Costa Rica), Manuel Rivera (Purdue), María Amelia Salazar (UFF), José Alejandro Samper (Puc-Chile), José Simental Rodríguez (UC Davis), Soledad Villar (John Hopkins).

Geometry, Dynamics and Mechanics Seminar

Every 2 weeks on Tuesdays, 15:00 GMT (12:00 Brasilia). A series of online seminars aiming at maintaining and reinforcing collaboration and connection among researchers working in the broad field of Geometry, Dynamics and Mechanics. Further info:

Organizers: Paula Balseiro (UFF), Francesco Fassò (Padova), Luis García-Naranjo (UNAM), David Iglesias-Ponte (La Laguna), Tudor Ratiu (Shanghai), Nicola Sansonetto (Verona).

Latin American Real and Tropical Geometry Seminar

Bi-weekly on Fridays, 11:00. See event's website.

Organizers: Alicia Dickenstein (AR); Ethan Cotterill, Oliver Lorscheid and Marco Pacini (BR); Johannes Rau (CO); Fuensanta Aroca and Cristhian Garay López (MX).

Seminário de Combinatória

Last Wednesday of each month, 13:00, remotely via Google Meet. Further info:

Organizer: Simone Dantas (UFF).

Seminário de EDP e Matemática Aplicada

Biweekly on Wednesdays, 14h, via Google Meet. See website.

Organizers: Juan Limaco (UFF), Mauro Rincon (UFRJ) and Max Souza (UFF).

Seminário Simplético do Rio

Tuesdays, 14h-15h, online via Google Meet: see event's calendar.

Organized by IMPA, PUC-RJ, UFF and UFRJ. Contact at UFF: This email address is being protected from spambots. You need JavaScript enabled to view it..

Seminário em Teoria Espectral de Grafos

Biweekly on Mondays, 15h. Contact organizers for specific info.

Organizer: This email address is being protected from spambots. You need JavaScript enabled to view it. (UFF).

Web-Seminar on Geometric Analysis

Thursdays, 14h, throughout August 2020, online via Google Meet:

Further info:

Organizers: Detang Zhou (UFF), Ernani Ribeiro Jr (UFC), Keti Tenenblat (UnB).

WorkGroup on Topological Data Analysis

Thursdays, 16h-18h.

Further info: contact the organizer by E-mail at This email address is being protected from spambots. You need JavaScript enabled to view it..

Organizer: Carlos Meniño Cotón (UFF).


LAWCG 2020 + MDA 2020

(IX Latin-American Workshop on Cliques in Graphs + Discrete Mathematics and Applications Workshop)

Date: 25 nov 2020.

Place: Room 207, Bloco H, Campus Gragoatá, UFF.

Confirmed Plenary Talks: João Meidanis (UNICAMP, Brazil), Carmen Ortiz (U Valparaíso, Chile); Monica Villanueva (USACH, Chile).

Deadlines and More Info:

We are very pleased to announce that the 9th Latin American Workshop on Cliques in Graphs will be held remotely on November 25th, 2020. Following the previous workshops in Rio de Janeiro, Brazil (2002), La Plata, Argentina (2006), Guanajuato, Mexico (2008), Itaipava, Brazil (2010), Buenos Aires, Argentina (2012), Pirenópolis, Brazil (2014), La Plata, Argentina (2016), and Rio de Janeiro, Brazil (2018), the workshop is meant to foster interaction between the Latin American Graph Theory and Combinatorics community, whose research interests include cliques, clique graphs, the behavior of cliques and other topics in Graph Theory.

This year LAWCG will take place in conjunction with the Discrete Mathematics and Applications Workshop (MDA). The MDA ( is a national scientific event which brings together researchers from renowned research centers in the field of Discrete and Combinatorial Mathematics, and students and teachers from public high schools. Since 2013, MDA has promoted the dissemination of Mathematics through activities inserted in projects supported by Brazilian funding agencies CAPES, CNPq and FAPERJ.

The official languages are English, Portuguese, and Spanish.


Our Calendar 2020 (modified)


Summer Program: 06/01 to 06/03

1st Term: 06/04 to 24/07

2nd Term: 24/08 to 18/12


Read more: Calendar 2020


In 2015, we moved to our new campus, Gragoatá! Our new address is:

R. Prof. Marcos Waldemar de Freitas Reis, s/nº - Bloco H - 4º andar
Campus do Gragoatá
24210-201- Niterói - RJ
Tel: 55 - 21 - 2629-2171

Or on Google Maps:

Getting Here via Public Transportation

  1. From Niterói's downtown: walk 16 minutes (map) or take buses 47, 47A or 47B (these buses are colored red).
  2. From Rio's downtown: take the ferry from Praça XV towards Araribóia Niterói, and fall back to Case 1 (map).
  3. From Santos Dumont Airport: walk 15 minutes (map) to Praça XV, and fall back to Case 2.
  4. From South Zone in Rio: take one of the following buses Ipanema-Charitas (740D or 741D) or Gávea-Charitas (750D or 751D or 775D) and go to Case 1.
  5. From International Airport Tom Jobim (a.k.a. Galeão): take bus Galeão-Charitas (760 or 761) and go to Case 1.