Jeudi 2 Juin
Heure: 
10:15  12:00 
Lieu: 
Salle B405, bâtiment B, LAGA, Institut Galilée, Université Paris 13 
Résumé: 
Topologie algébrique  VershikOkounov and GelfandTsestlin and SchurWeyl  
Description: 
Pablo ZadunaiskyIn the first part of this talk I will present Vershik and Okounkov’s approach to the representation theory of the symmetric groups. Their approach enters on a family of commuting operators in the group algebra called JucysMurphy elements. These generate a maximal commutative algebra inside the group algebra, and their action on simple representations naturally produces the various combinatorial objects usually appearing in the representation theory of S_d. Their approach is inspired in the GelfandTsetlin construction of representations of the Lie algebra gl_n, which I will also briefly discuss. Putting both approaches together gives a nice perspective on SchurWeyl duality in type A. 
Heure: 
17:00  18:00 
Lieu: 
(en visioconférence) 
Résumé: 
Discussions mathématiques francomarocaines  Oscillatory dynamics for some evolution equations using Favard’s theory in uniformly convex Banach spaces  
Description: 
Khalil EZZINBI In this work, we use an approach due to Favard (Acta Math 51:31–81, 1928) to study the&nbsp;some evolution equation whose linear part generates a C 0 group satisfying the Favard&nbsp;is a condition stronger than Favard’s condition, we prove the equivalence between&nbsp; 

