A common theme in algebraic geometry is degeneration: we consider a family of smooth spaces which degenerates into a singular…
Eventi
Planar aggregation with subcritical fluctuations and the Hastings-Levitov models – Vittoria Silvestri (Università di Roma La Sapienza)
The ALE (Aggregate Loewner Evolution) models describe growing random clusters on the complex plane, built by iterated composition of random…
Equazioni sui gruppi liberi e linguaggi liberi dal contesto – Dario Ascari (University of Oxford)
Data un’estensione di campi K<F ed un elemento a in F, un oggetto naturale da studiare è l’ideale I(a) di K[x] dei polinomi p(x) tali che p(a)=0; tale ideale è…
Charge, Atoms and Crystals in Representation Theory – Leonardo Patimo (Albert-Ludwigs-Universität Freiburg)
The dimensions of the weight spaces of irreducible representations of reductive groups can be q-deformed, obtaining the Kostka-Foulkes polynomials, which measure the dimensions of the Brylinski-Kostant filtration and therefore have positive…
Perfect Shifted QR for Rank Structured Pencils – Vandebril Raf (KU Leuven)
It is known that executing a perfect shifted QR step via the implicit QR algorithm performs poor in terms of stability, and accuracy. Typically several steps are required before deflation actually takes place. This behavior can be remedied by…
SL(2,C)-character varieties of knots and maps of degree 1 – Raphael Zentner (Durham University)
We ask to what extend the SL(2,C)-character variety of the fundamental group of the complement of a knot in S^3 determines…
Categorified Beauville-Laszlo theorem (and related problems) – Mauro Porta (Université de Strasbourg)
Sheaves of Azumaya algebras were introduced by Grothendieck to represent classes in the cohomological Brauer group of schemes, i.e. $Br(X) := H^2_{ét}(X;G_m)$, along the same lines every class in $H^1_{ét}(X;G_m)$ is representable by a line bundle…
Instanton Floer homology of almost-rational plumbings – Antonio Alfieri (CRM)
Plumbed three-manifolds are those three-manifolds that can be be realized as links of isolated complex surface singularities. Inspired by Heegaard…
Capacity and torsional rigidity: two measures of spectral stability – Roberto Ognibene (Università di Pisa)
In this talk, I will discuss the behavior of the spectrum of the Laplacian on bounded domains, subject to varying…
Construction on quasi-periodic nonlinear waves in fluid mechanics – Riccardo Montalto (Università di Milano Statale)
In this talk, I will discuss some recent results on Euler and Navier Stokes equations concerning the construction of quasi-periodic…