L'IECL

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Séminaire: Convection-dominated transport problems in thin graph-like networks

5 décembre 2025 @ 11:00 – 12:00 – The lecture addresses time‑dependent convection–diffusion problems with high Péclet number in thin 3D graph‑like networks of curvilinear cylinders connected by nodes of diameter $\mathcal{O}(\varepsilon).$ Inhomogeneous Robin boundary conditions with different intensity factors are imposed on the network boundary. As $\varepsilon \rightarrow 0,$ the network collapses to a graph and the diffusion terms vanish. Such problems […]

On Halász‘s theorem

4 décembre 2025 @ 14:30 – 15:30 – The prime number theorem tells us the number of primes up to x is $(1+o(1))x/\log x$. An equivalent form is that $\sum_{n\leq x} \mu(n)=o(x)$, where $\mu$ is the Möbius function which is $1$-bounded multiplicative. It is natural to study the properties of $1$-bounded multiplicative functions $f$ such that $\sum_{n\leq x} f(n)=o(x)$. In this talk, we […]

About some approximation problems for Sobolev maps to manifolds

2 décembre 2025 @ 10:45 – 11:45 – In a striking contrast with the classical case of real-valued Sobolev functions, a Sobolev map with values into a given compact manifold N need not be approximable with smooth N-valued maps. This observation, initially due to Schoen and Uhlenbeck (1983), gave rise to a whole area of research concerned with questions related to approximability properties […]

Séminaire commun de géométrie

1 décembre 2025 @ 14:00 – 16:00 – IPVTs and applications I will discuss limits in low intensity of Poisson-Voronoi tessellations, which we called ideal Poisson-Voronoi tessellations (IPVTs). In the colloquium part, I will focus on the IPVT of real hyperbolic space of dimension d, where a simple Poissonian description of the cell containing the origin enables an in-depth study of the geometric […]

Séminaire: Propagation of coherent states in Quantum Field Theory

28 novembre 2025 @ 11:00 – 12:00 – Bohr’s correspondence principle asserts that the predictions of classical and quantum mechanics coincide in the limit of large quantum numbers. This connection becomes especially striking when one studies Schrödinger-type equations for initial data minimising the uncertainty principle, known as « gaussian coherent states », in the semiclassical limit. More precisely, in the context of quantum mechanics, one […]

On real zeros of the first derivative of quadratic Dirichlet $L$-functions

27 novembre 2025 @ 14:30 – 15:30 – One of the central topics in number theory is the study of $L$-functions and the distribution of their zeros. For example, the celebrated Prime Number Theorem is equivalent to the fact that the Riemann zeta function $\zeta(s)$ does not vanish on the line $\text{Re}(s)=1$. In this talk, we will focus on quadratic Dirichlet $L$-functions: in […]

Sur l’éclatement de type Nash des algebroïdes de Lie et des feuilletages singuliers

27 novembre 2025 @ 14:00 – 15:00 – Nous prouvons que tout algebroïde de Lie A admet un éclatement de type Nash(A), qui s’insère dans une suite exacte courte d’algebroïdes de Lie \( 0 \to K \to \mathrm{Nash}(A) \to D \to 0, \) où K est un fibré en algèbres de Lie et D un algebroïde de Lie dont l’ancre est injective sur un ouvert dense. La variété […]

Journées Probabilités et Statistique

27 novembre 2025 – 28 novembre 2025 @ Toute la journée – Consulter le programme en cliquant sur ce lien : https://bul.univ-lorraine.fr/index.php/s/odBkpE9tBLAjmtJ Retrouvez toutes les informations sur le site web de l’événement à cette adresse : iecl.univ-lorraine.fr/journees-ps-2025/