11/03/19  Seminario  14:30  15:30  1201 Dal Passo  Wolfgang SOERGEL  Freiburg University  TBA
TBA 
10/12/18  Seminario  14:30  15:30  1201 Dal Passo  Gwyn BELLAMY  Glasgow University 
TBA
TBA 
29/10/18  Seminario  16:00  17:00  1201 Dal Passo  Niels KOWALZIG  Università di Napolo "Federico II"  Higher brackets on cyclic and negative cyclic (co)homology
In this talk, we will embed the string topology bracket developed by ChasSullivan and Menichi on negative cyclic cohomology groups as well as the dual bracket found by de Thanhoffer de VoelcseyVan den Bergh on negative cyclic homology groups into the global picture of a noncommutative differential (or Cartan) calculus up to homotopy on the (co)cyclic bicomplex in general, in case a certain Poincar´ duality is given. For negative cyclic cohomology, this in particular leads to a BatalinVilkovisky algebra structure on the underlying Hochschild cohomology. In the special case in which this BV bracket vanishes, one obtains an e_3algebra structure on Hochschild cohomology. The results are given in the general and unifying setting of (opposite) cyclic modules over (cyclic) operads.
All this is joint work with D. Fiorenza. 
22/10/18  Seminario  16:00  17:00  1201 Dal Passo  Layla SORKATTI  AlNeelain University, Khartoum  Symplectic alternating algebras
We first give some general overview of symplectic alternating algebras and then focus in particular on the structure and classification of nilpotent symplectic alternating algebras.
N.B.: this talk is part of the activity of the MIUR Excellence Department Project CUP E83C18000100006 
10/10/18  Seminario  16:00  17:00  1201 Dal Passo  Alexander Stottmeister  Roma "Tor Vergata"  Operator algebras, lattice gauge theory, and renormalization
We will discuss an operatoralgebraic approach to lattice gauge theory and its relation to a recent construction by Jones of representations of the Thompson group. Furthermore, we will outline a framework of rigorous renormalization group theory and scaling/continuum limits in this context.

02/10/18  Seminario  14:30  15:30  1201 Dal Passo  Antonio Marigonda  Universita' di Verona  A Bolza problem for multiagent systems
A multiagent system is a system in the finitedimensional Euclidean space where the number of possibly interacting agents is so large that only a statistical description of the state of the system is actually available. A common way to model such kind of systems is to describe the state of the system at time t by mean of a Borel measure m_t where, for each Borel subset A of R^d, the quotient m_t(A)/m_t(R^d) represents the fraction of the total number of agents that are present in the set A at time t over the total number of agents. In the case where neither creation nor destruction of agents are allowed, we normalize the total mass to the constant 1, thus m_t becomes a timedepending probability measure. We consider such a system subject to a centralized controller aiming to minimize a cost function of Bolza type. We formulate the minimization problem as a problem for a dynamics in the Wasserstein space represented by a controlled continuity equation describing the macroscopical evolution of the system. We prove that the value function V of the problem solves a HamiltonJacobi equation in the Wasserstein space in a suitable viscosity sense, and prove a comparison principle for such an equation, thus characterizing V as the unique viscosity solution of the HamiltonJacobi equation associated to the problem. 
24/09/18  Seminario  14:30  15:30  1101 D'Antoni  Pramod N. ACHAR  Louisiana State University 
The Humphreys conjecture on support varieties of tilting modules
Let G be a reductive algebraic group over a field of positive characteristic. This talk is about geometric invariants of representations of G. Given a finitedimensional Grepresentation V, classical results of AndersenJantzen and FriedlanderParshall make it possible to associate to V a certain subset of the nilpotent elements in the Lie algebra of G, called the "support variety of V". About 20 years ago, Humphreys proposed a conjectural description of the support variety for an important class of modules called tilting modules. I will discuss recent progress on this conjecture. This is joint work with William Hardesty and Simon Riche.
N.B.: this talk is part of the activity of the MIUR Excellence Department Project CUP E83C18000100006 
12/09/18  Seminario  16:00  17:00  1201 Dal Passo  Yasuyuki Kawahigashi  University of Tokyo  Relative boundarybulk duality and orbifold subfactors.

11/09/18  Seminario  14:30  15:30  1201 Dal Passo  Gershon Wolansky  Department of Mathematics, Technion  Israel Institute of Technology, Haifa 32000, Israel  From optimal transportation to optimal teleportation
I will review basic concepts from optimal transportation theory, and introduce some limit theorems which reveal some connections between different metrics on measure spaces. Among possible application are new models for congested traffic.

18/07/18  Seminario  16:00  16:45  1201 Dal Passo  Aleks Jevnikar  Università di Pisa  Uniqueness results for singular Liouville equations.
We discuss uniqueness aspects for solutions to Liouville equations. We start by giving an overview of the known results. Then, we present some recent results as well as a new selfcontained proof of previously known results. To this end, we introduce the socalled Sphere Covering Inequality.
