Mardi 14 Avril
Heure: 
14:00  17:00 
Lieu: 
Salle B107, bâtiment B, Université de Villetaneuse 
Résumé: 
Diamètre et hamiltonicité des associaèdres de graphe 
Jeudi 16 Avril
Heure: 
14:30  15:30 
Lieu: 
Salle B107, bâtiment B, Université de Villetaneuse 
Résumé: 
"Formalising Concurrent UML State Machines Using Coloured Petri Nets" 
Description: 
Mohamed Mahdi Benmoussa While UML state machines are widely used to specify dynamic systems behaviours, their semantics is described informally, which prevents the complex systems verification. In this paper, we propose a formalisation of concurrent UML state machines using coloured Petri nets. We consider in particular concurrent aspects (orthogonal regions, forks, joins, shared variables), the hierarchy induced by composite states and their associated activities, internal/external/local transitions, and entry/exit/do behaviours. 
Vendredi 17 Avril
Heure: 
11:00  12:30 
Lieu: 
Salle B107, bâtiment B, Université de Villetaneuse 
Résumé: 
gdt Homotopy Type Theory  séance 1 
Description: 
Andrew Polonsky The first of a little series of talks on Homotopy Type Theory (i.e., higherorder algebraic treatment of the notion of equality in dependant type theory).
Logical relations are a technique for proving metatheoretic properties of type systems. In recent years, they have received a lot of attention as it became clear that logical relations give the most natural definition of extensional equality in type theory. A major open problem is to define a type system which contains extensional equality as an internal type constructor. For this, it is necessary to reflect the external logical relation back into the syntax of the type language. In this talk I will describe how to do this. 

