Analysis and probability seminar
Analysis and probability seminar
The seminar is joint for the division of Analysis and Probability within the Department of Mathematics at Chalmers / GU. Its main themes include Probability Theory, Mathematical Physics, Operator Algebras, and Harmonic and Functional Analysis.
Should you have any questions or suggestions, feel free to email one of the organizers Malin Palö Forsström (palo 'at' chalmers.se), Simon Larson (larsons 'at' chalmers.se) or Spyros Petrakos (petrakos 'at' chalmers.se).
Instructions for invited speakers:
The seminar caters to a broad audience in analysis and probability. We thus urge speakers to make the first 10-15 minutes of the talk very introductory, aimed at first-year graduate students. The total time for the seminar is 50 minutes plus 10 minutes for questions.
2026-09-15 at 13:15, MVL14
Eusebio Gardella (Chalmers/GU)
Title: The isomorphism problem for \ell^1-crossed products
Abstract: Given an action $G\curvearrowright X$ of a discrete group $G$ on a compact Hausdorff space $X$, it is natural to consider the convolution algebra $\ell^1(G\curvearrowright X)$, whose underlying Banach space is $\ell^1(G,C(X))$, and where multiplication is (twisted) convolution. Recent works of de Jeu-Tomiyama and of Roland show that this Banach algebra encodes more information than the more widely studied C*-algebraic crossed product $C(X)\rtimes G$, which is the completion of $\ell^1(G\curvearrowright X)$ with respect to covariant representations on Hilbert spaces. In this talk, which is based on joint work with Tabare Roland, I will discuss the isomorphism problem for such \ell^1-algebras, trying to give an answer to the following question: what can be said about two dynamical systems $G\curvearrowright X$ and $H\curvearrowright Y$ if there is an isometric isomorphism $\ell^1(G\curvearrowright X)\cong \ell^1(H\curvearrowright Y)$?
2026-09-22 at 13:15, MVL14
Marvin Schulz (University of Copenhagen)
2026-09-23 at 10.30, MVL14 (unusual time)
Tommaso Aschieri (University of Copenhagen)
Title: Sharp quantization of complex projective spaces
Abstract: The framework of Berezin-Toeplitz quantization is a popular approach in the quantization of Kähler manifolds, which brings together geometric and representation-theoretic considerations. It is the non-flat analogue of the anti-Wick quantization scheme. In this talk, I will introduce some fundamental concepts in the theory of BT quantization, and explain how they can be obtained from a representation-theoretic approach. I will then present recent work with B. Ruba and J. P. Solovej on the particular case of complex projective spaces. These are the homogeneous spaces associated with the symmetric representations of SU(d), and their rich symmetry allows for a particularly explicit analysis. I will explain how to get sharp asymptotic expansions of the product of Toeplitz operators and introduce an interesting notion of positivity of the remainder in these expansions.
2026-09-29 at 13:15, MVL14
Peter Rudzis (Chalmers/GU)
2026-10-06 at 13:15, MVL14
Martin Vrabec (Max Planck Institute, Bonn)
Title: Generalised matrix Calogero–Moser operators from Cherednik algebras
Abstract: The Calogero–Moser integrable model describes a physical system of interacting particles on a line (rational case) or a circle (trigonometric case) with an inverse-square distance pairwise potential. This potential is naturally associated with the root system of type A. Integrable versions of this model for arbitrary root systems were introduced by Olshanetsky and Perelomov. It was discovered by Chalykh, Feigin, and Veselov that, in the quantum case, there exist integrable generalisations for some configurations of vectors that are not root systems. The Hamiltonians of these quantum systems are Schrödinger operators whose potentials have singularities along hyperplanes determined by the given configuration of vectors. These ‘generalised Calogero–Moser operators’ were studied in the rational case with the use of rational Cherednik algebras by Feigin. A matrix version (for particles with spin internal degrees of freedom) of the quantum Calogero–Moser model appeared in the work of Ha and Haldane, and a matrix version of the Olshanetsky–Perelomov operators was considered by Cherednik. First examples of integrable matrix Calogero–Moser type operators associated with non-symmetric configurations of vectors were found by Chalykh, Goncharenko, and Veselov. In this talk, I will show how one can use the theory of (rational and trigonometric) Cherednik algebras to obtain many new generalisations of their examples. This is a joint work with M. Feigin and M. Vasilev.
2026-10-13 at 13:15, MVL14
Elena Pagnin (Chalmers/GU)
2026-10-20 at 13:15, MVL14
Hjalmar Rosengren (Chalmers/GU)
2026-10-27 at 13:15, MVL 14
Mihály András Csirik (Chalmers/GU)
Title: The non-uniform electron gas
2026-11-10 at 13:15, MVL14
Ian Thompson (University of Copenhagen)
2026-11-10 at 10:30, MVL14 (unusal time)
Andreas Rosén (Chalmers/GU)
2027-01-12 at 13:15, MVL14
Frank den Hollander (Leiden University)
2026-01-20: Simon Leo Myerson (Chalmers), Bounds for spectral projectors on tori
2026-02-17: Corentin Correia (IMJ-PRG, France), Odomutants and flexibility results for quantitative orbit equivalence
2026-02-24: Peter Sjögren (Chalmers/GU), On the maximal operator in a nonsymmetric inverse Gaussian setting
2026-03-03: David Kerr (Münster), Stable rank one in nonnuclear crossed products
2026-03-10: Jeffrey E. Steif (Chalmers/GU), What is the Gaussian Free Field?
2026-03-17: Lukas Schoug (KTH), A first passage metric of the Gaussian free field
2026-03-24: Mikael Persson Sundqvist (Lund), Magnetic Schrödinger operators in the unit disk
2026-03-31: Marco Michetti (Chalmers/GU), Structure of the Robin Harmonic Measure on Rough Domains
2026-04-07: Johan Wästlund (Chalmers/GU), Moment generating functions in combinatorial optimization
2026-04-14: Irene Ayuso Ventura (Durham), The critical random cluster model on Bienaymé–Galton–Watson trees
2026-04-21: Antonio Peralta (Granada), The metric fingerprints of a (not necessarily associative) Banach algebra
2026-04-27: Klara Zimmerman (FOI), A new algorithm for Electrical Impedance Tomography in two dimensions
2026-04-28: Magnus Goffeng (Lund), Poisson transforms and the Baum-Connes conjecture
2026-05-05: Vern Paulsen (University of Waterloo), Exactness and Lifting Results via Operator System Methods
2026-05-12: Evgenios Kakariadis (University of Athens), Symmetrisation products and systems of operators
2026-05-19: Levi Haunschmid-Sibitz (KTH), One-sided convergence of the stochastic six-vertex model and parabolic Kazhdan-Lusztig R polynomials
2026-05-26: Matteo Pagliero (SDU), Corona algebras and strongly self-absorbing C*-dynamics
2026-05-28: Jean Lagacé (King’s College London), Steklov listens to the regularity
2026-06-02: Mizanur Rahaman (Chalmers/GU), Jensen's inequality for partial traces in von Neumann algebras
2026-06-09: Bernt Wennberg (Chalmers/GU), Title: Hilbert’s 6th Problem and the Validation of the Boltzmann Equation
2025-01-21: Ulrik Thinggaard Hansen (Copenhagen), Universality of the Large-Scale Geometry for Planar Critical Random-Cluster Models
2025-01-28: Peter Sjögren (Chalmers/GU), Variational inequalities for the Ornstein--Uhlenbeck semigroup in higher dimensions
2025-02-11: Emilie Elkiær (Oslo), Symmetrized pseudofunction algebras from L^p-representations and amenability of locally compact groups
2025-02-18: Robin van Haastrecht (Chalmers/GU), Wehrl-type inequalities for the holomorphic discrete series
2025-02-25: Sascha Troscheit (Uppsala), Fractal percolation, dimensions, connected components, and other recent progress
2025-03-04: Mikhail Menshikov (Durham, UK), Dynamics of finite and semi-infinite particle systems with exclusion interaction
2025-03-11: Fredrik Viklund (KTH) -- joint AP and KASS seminar, Free energy of planar Coulomb gases
2025-03-18: David Jekel (Copenhagen), Upgraded free independence relations for random unitaries
2025-03-25: Sanaz Pooya (Potsdam), K-Theory of higher Kazhdan projections and applications to delocalised L2-Betti numbers
2025-04-22: Rostyslav Kozhan (Uppsala), Multiple orthogonal polynomials on the unit circle and the Hermite-Pade approximation
2025-04-29: Kristin Courtney (SDU, Denmark), At the limit of matrix algebras
2025-05-06: Lyudmila Turowska (Chalmers/GU), Self-testing: an operator algebraic approach
2025-05-13: Dragu Atanasiu (Borås), The moment problem on compact sets of characters
2025-09-09: Alejandro Rodriguez Sponheimer (Lund), Dynamical Strong Borel--Cantelli Lemmas for Recurrence
2025-09-16: Martino Lupini (Bologna, Italy), Phantom invariants in analysis
2025-09-23: Ryan L. Acosta Babb (Warwick, UK), Lp continuity of spectral projections for the Laplacian on Euclidean domains
2025-09-30: Ebrahim Samei (Saskatchewan, Canada), A harmonic analysis approach to random walks and group actions
2025-10-07: I-Kun Chen (National Taiwan University, Taiwan), On the existence and regularity of weakly nonlinear stationary Boltzmann equations: a Fredholm alternative approach
2025-10-14: Sebastian Bechtel (Université Paris-Saclay), Well-posedness of non-linear parabolic equations with rough coefficients and data
2025-10-16: Erik Lindgren (KTH), Extremals for Poincaré–Sobolev inequalities
2025-10-21: Moritz Schauer (Chalmers/GU), The categorical semantics of conditioning Markov models
2025-10-28: Bastien Dubail (KTH), Cutoff for mixtures of permuted Markov chains
2025-11-11: Tatiana Shulman (Chalmers/GU), Cones and asymptotic liftings
2025-11-18: Gábor Szabó (KU Leuven), The uniqueness theorem for Kasparov theory
2025-12-02: Spyros Petrakos (GU/Chalmers), Quantitative orbit equivalence for ℤ-odometers
2025-12-08: Eero Saksman (University of Helsinki), Some random geometry in Riemann zeta
2025-12-16: Stefano Almi (Naples Federico II)
2025-12-16: André Laestadius (Oslo Metropolitan)
2025-12-16: Bartosz Malman (Mälardalen)
2024-01-23: Ulrik Enstad (Oslo), Classifiability of C*-algebras associated with point sets
2024-01-30: Pieter Spaas (Copenhagen): Local Hilbert-Schmidt stability
2024-02-07: Lashi Bandara (Deakin University, Melbourne), Trace, Regularity, Fredholmness: the story of non-compact boundary for first-order elliptic operators
2024-02-13: Johan Wästlund (Chalmers/GU), Billiards, Checkers, and Quadratic Reciprocity
2024-02-20: Shrish Parmeshwar (Warwick, UK), Global-in-time Vortex Configurations for the 2D Euler Equations
2024-02-27: Eduard Vilalta (Chalmers/GU), Nowhere scattered multiplier algebras
2024-03-05: Are Austad (Syddansk Universitet, Odense), Ideal intersection properties for group-graded Banach *-algebras
2024-03-12: Peter Sjögren (Chalmers/GU), Variation inequalities for the Ornstein-Uhlenbeck semigroup
2024-03-14: Erik Duse (KTH), Generic ill-posedness of the energy-momentum equations in the vectorial calculus of variations
2024-03-20: Tobias Weich (Paderborn), Polyhedral bounds on the joint spectrum on higher rank locally symmetric spaces
2024-04-02: Malin Palö Forsström (Chalmers/GU). Poisson coverage processes
2024-04-10: David Rule (Linköping), Multilinear and Weighted Estimates for Oscillatory Integral Operators
2024-04-16: Eric Ling (Copenhagen), Rigidity aspects of Penrose's singularity theorem
2024-04-23: Håkan Andreasson (Chalmers/GU), Existence of a minimizer to the particle number-Casimir functional for the Einstein-Vlasov system
2024-04-30: Robin van Haastrecht (Chalmers/GU), Limit formulas for the trace of the functional calculus of quantum channels for $SU(2)$
2024-05-07: Søren Fournais (Copenhagen), On the ground state energy of the dilute Bose gas
2024-05-21: Hedong Hou (Laboratoire de Mathématiques d'Orsay, Université Paris-Saclay), Well-posedness for parabolic Cauchy problems with distributional initial data
2024-05-28: Wojciech Szymanski (Syddansk Universitet), Cuntz algebras and the Thompson groups
2024-05-28: Frank Thuijsman (Maastricht University), Game Theory, from John von Neumann to Treatment of Cancer
2024-05-29: Alessandro Bravetti (Universidad Nacional Autónoma de México), From Fisher to Fisher: using Fisher information to understand Fisher's Fundamental Theorem of Natural Selection
2024-06-11: Jorge Castillejos (UNAM, Cuernavaca)
2024-06-11: Mizanur Rahaman (ENS, Lyon), Quantum Stein's Lemma and subalgebra entropies
2024-06-18: Leif Arkeryd (Chalmers/GU), On Boltzmann type equations with discrete velocities
2024-08-27: Khalid Koufany (Université de Lorraine, Nancy, France), A characterization of the $L^2$-range of the generalized spectral projections related to the Hodge-de Rham Laplacian
2024-09-10: Hannes Thiel (Chalmers/GU), Pure C*-algebras
2024-09-17: Cécile Mailler (Bath, UK), A two-table theorem for a disordered version of the Chinese restaurant process (CRP)
2024-09-19: Andreas Rosén (Chalmers/GU), Coerciveness and Morrey inequalities for elliptic operators with natural boundary conditions via Weitzenböck identities
2024-09-24: Jonathan Breuer (Hebrew University of Jerusalem / Mittag-Leffler), Towards a Floquet Theory for Periodic Jacobi Matrices on Trees
2024-10-15: Tomas Berggren (KTH), Crystallization of the Aztec diamond
2024-10-22: Emilie Elkiær (Oslo), Symmetrized pseudofunction algebras from L^p-representations and amenability of locally compact groups
2024-11-05: Alexander Müller-Hermes (Oslo), Monogamy of entanglement in quantum theory and beyond
2024-11-07: Erik Broman (Chalmers/GU), Phase transitions of semi-scale invariant Poissonian random fractals
2024-11-12: Alistair Miller (SDU, Denmark), Homology and K-theory for self-similar group actions
2024-11-19: Terry Soo (UCL, UK), Some variants of the Sinai factor theorem
2024-11-20: Fatma Ayça Cetinkaya (Mersin University, Turkey), NSBF Method for an Inverse Sturm--Liouville Problem
2024-11-26: Mathias Palmstrøm (NTNU, Norway), Rigidity of Lp-operator algebras associated with ample groupoids
2024-12-03: Damian Osajda (Copenhagen), Burnside groups and Kazhdan’s property (T)
2024-12-10: Kaj Nyström (Uppsala), Caloric Measure and Parabolic Uniform Rectifiability
2024-12-17: Lorents Landgren (Chalmers/GU), Identifying most reliable graphs
2024-12-20: Lashi Bandara (Deakin University), Geometric singularities and Hodge theory