Silvia
de Toffoli
IUSS Pavia
MATH+ Friday Colloquium 📅
Institute
Description
The Friday colloquia represent a common meeting point for Berlin mathematics: a colloquium with broad emanation that permits an overview of large-scale connections and insights. In thematic series, the conversation is about "mathematics as a whole," and we hope to be able to witness some breakthroughs. Hardly anyone knows that Grigory Perelman first presented his famous proof of the Poincaré Conjecture to the mathematical public in Berlin, at the PhD student seminar meeting of professors Huisken and Ecker at FU Berlin.
Usual time
Fridays at 14:15
Number of talks
247
Comment
Venues rotate by date across FU (T9), TU (MA001), HU, U Potsdam, and occasionally external venues (e.g., Langenbeck‑Virchow‑Haus); check each announcement. Typically preceded by a "What is...?" seminar at 13:00 and coffee at 13:15.
2026
Emanuel
Milman
Technion
Angela
Gibney
U Penn
Kovalevskaya Colloquium
Alexandra
Carpentier
U Potsdam
Statistical and computational challenges in unsupervised learning: focus on ranking
Abstract
2025
Barbara
Niethammer
U Bonn
The classical coagulation equation: gelation, self-similarity and oscillations
Abstract
Julia
Böttcher
LSE
Randomness, quasirandomness, and decomposition problems
Andrea
Walther
HU Berlin
On optimality conditions for nonsmooth functions
Silvia
De Toffoli
IUSS Pavia
Kovalevskaya Lecture
Adriana
Garroni
Sapienza U Rome
Emergence of defects at grain boundaries: Variational analysis
Abstract
Carla
Cederbaum
U Tübingen
Coordinates are messy in general (relativity)
Ilya
Chevyrev
U Edinburgh/TU Berlin
Rough Analysis
Ilya
Cheyrev
U Edinburgh
2024
Roman
Sauer
KIT
From Kazhdan’s property (T) to higher-dimensional expansion
Laura
Ciobanu
HWU
Undecidable problems in group theory
Ana Maria
Botero
U Bielefeld
and
José Ignacio
Burgos Gil
ICMAT
and
Jean-Benoît
Bost
U Paris XI
and
Maryna
Viazovska
EPFL
A Day of Arithmetic Geometry (on the occasion of the retirement of Jürg Kramer)
Abstract
Heather
Harrington
MPI Dresden
Topology Data Analysis for Multiscale Biology
Martin
Burger
DESY, Helmholtz Imaging
Particle Methods in Machine Learning and Inverse Problems
Richard von Mises Lectureregister here
On the inverse conductivity problem
Heather
Harrington
MPI Dresden
Topology Data Analysis for Multiscale Biology
Anna
Wienhard
MPI Leipzig
Beyond hyperbolic geometry
Julian
Sahasrabudhe
U Cambridge
A new lower bound for sphere packing
Christoph
Sorger
CNRS Nantes
Holomorphic symplectic geometry
A stochastic model for the growth of a filamentous fungus
The K-Theory of Z/n
Tropical geometry
2023
The symplectic topology of singularities
Equations over groups
Low complexity colorings of the two-dimensional grid
Approximation Algorithms for Network Design Problems
Christian
Kuehn
TUM
Multiscale Dynamics: From Finite to Infinite
Jean-Michel
Coron
U Pierre-et-Marie-Curie
Boundary stabilization of 1-D hyperbolic systems
Sven
Raum
U Potsdam
Operator algebraic group theory
Anja
Sturm
U Göttingen
Interacting particle systems and the contact process on random graphs
Anja
Schlömerkemper
U Würzburg
Various Structures in Mathematics of Materials Science
Laurent
Clozel
U Paris-Sud
Topological realization of Eisenstein cohomology
Stephen
Wright
U Wisconsin - Madison
Optimization in Data Science
Bruno
Vallette
U Sorbonne Paris Nord
Why higher structures?
Robert
Lazarsfeld
Stony Brook U
How irrational is an irrational variety?
2022
Lisa
Sauermann
MIT
On the cap-set problem and the slice rank polynomial method
Bruno
Klingler
HU Berlin
Hodge theory, between algebraicity and transcendence
Peter
Scholze
MPI Bonn
Condensed Mathematics
Carlos Enrique
Améndola Cerón
TU Berlin
Algebraic Statistics: Past, Present and Future
Arunima
Ray
MPI Bonn
Embedding surfaces in 4-manifolds
Irit
Dinur
Weizmann Institute of Science
P, NP, and Probabilistically Checkable Proofs as part of the Millenium Festival Event and BMS Certificate CeremonyLink to the live-stream
Christoph
Reisinger
U Oxford
Simulation and control of stochastic mean-field models: from starlings over neurons and traders to supercooling
Thomas
McCormick
UBC
Why Should You Care About Submodularity?
Maryna
Viazovska
EPFL
Sphere packings, universal optimality, and Fourier interpolation
Max
von Kleist
RKI
Data science for COVID research and in policy design
2021
Helmut
Hofer
IAS Princeton
The Floer Jungle: 35 Years of Floer Theory - in cooperation with the IAS/Princeton/Montreal/Paris/Tel-Aviv symplectic geometry zoominar
Carola-Bibiane
Schönlieb
U Cambridge
Mathematical imaging - together with an outlook on the upcoming TES "Mathematics of Imaging on Real-World Challenges"
Kathryn
Hess
EPFL Lausanne
Topological insights in neuroscience
Felix
Otto
MPI Leipzig
Martin R.
Bridson
U Oxford
Chasing finite shadows of infinite groups through geometry
Sebastian
Pokutta
TU Berlin/ZIB
Conditional Gradients in Machine Learning and Optimization
Maria
Chudnovsky
Induced subgraphs and tree decompositions
2020
Petra
Schwer
OVGU Magdeburg
Building bridges between Geometry and Algebra
Bhargav
Narayanan
Rutgers U
Thresholds
2019
Barbara
Zwicknagl
HU Berlin
Mathematical variations on pattern formation in smart materials
Samuel
Payne
U Texas, Austin
Tropical curves, graph homology, and top weight cohomology of M_g
Dana S.
Scott
Emeritus Carnegie Mellon University, Visiting Scientist/Scholar UC Berkeley
Geometry without points
Takashi
Kumagai
Kyoto U
Anomalous random walk and diffusion in random media
Katrin
Wendland
U Freiburg
Representations of Moonshine
Kristin
Shaw
U Oslo
On the topology of real algebraic hypersurfaces
Horst
Martini
Minkowski geometry from the discrete point of view
Jeff
Erickson
U Illinois
Variations on a theme of Steinitz
Deane
Yang
NYU Courant
Minkowski problems for convex bodies
Sylvie
Méléard
CMAP, École Polytechnique
Stochastic dynamics for adaptation and evolution of microorganisms
2018
Sylvie
Paycha
Are locality and renormalisation reconcilable?
András
Stipsicz
Alfréd Rényi Institute of Mathematics
Invariants of knots
Raman
Sanyal
The discrete and the continuous side of valuations – same same but different
Folkmar
Bornemann
TUM
Finite Size Effects: Random Matrices, Quantum Chaos and Riemann Zeros
Monique
Laurent
CWI Amsterdam
Ordering data with combinatorial graph algorithms
Felipe
Cucker
On the homology of semialgebraic sets
Daniele
Boffi
U Pavia
Finite element approximation of the Maxwell eigenvalue problem
BMS Friday
Grothendieck
Moritz Kerz (U Regensburg): Negative algebraic K-theory, Carlos Simpson (U Nice): From the nonabelian Grothendieck period conjecture to the structure of surfaces uniformized by the ball
Fatiha
Alabau-Boussouira
U Lorraine / LJLL at Sorbonne U
Control theory and some applications on inverse problems and degenerate equations
Christine
Bessenrodt
Leibniz Universität Hannover
Symmetries and tensor products
Louis J.
Billera
Cornell U
In pursuit of a white whale: On the real linear algebra of vectors of zeros and ones
Carola-Bibiane
Schönlieb
U Cambridge
Model based learning in imaging
Hélène
Barcelo
MSRI/UC Berkeley
Discrete Notions of Homotopy and Homology
Marlis
Hochbruck
KIT
On the numerical solutions of linear Maxwell's equations
2017
Anna
Wienhard
U Heidelberg
A tale of rigidity and flexibility: discrete subgroups of higher rank Lie groups
Claus
Scheiderer
U Konstanz
Spectrahedral shadows
Ilaria
Perugia
U Vienna
Trefftz finite elements
Steffen
Lauritzen
University of Copenhagen
Graphical models
Camillo
De Lellis
U Zurich
The Onsager Theorem and folding papers
Avi
Wigderson
IAS Princeton
Randomness
Thomas Valentin
Mikosch
U Copenhagen
Richard von Mises and the development of modern extreme value theory
Sujatha
Ramdorai
U British Columbia
Galois representations and Iwasawa theoretic invariants
Klaus-Robert
Müller
TU Berlin
Machine learning and AI for the sciences – towards understanding
Michael
Hutchings
UC Berkeley
Symplectic embeddings of cubes
Endre
Süli
U Oxford
Discontinuous Galerkin Finite Element Methods: Stability, Accuracy, Adaptivity
Monika
Ludwig
TU Vienna
Geometric classification
Dietrich
Stoyan
TU Bergakademie Freiberg
Stochastic Geometry in Nature, Arts and Design
2016
Christoph
Benzmüller
FU Berlin
Computational Metaphysics: The Virtues of Formal Computer Proofs Beyond Maths
Peter
Teichner
MPIM Bonn
Four-dimensional Manifolds revisited
Maryna
Viazovska
HU Berlin
Solving packing problems by linear programming
Alexander
Martin
FAU Erlangen-Nürnberg
Combinatorial optimization problems with physical constraints
Henry
Cohn
Mysteries of sphere packing in high dimensions
Bernd
Sturmfels
Tensors and their eigenvectors
Enrico
Arbarello
Enumerative geometry, intersection theory and moduli spaces
Shiri
Artstein-Avidan
U Tel Aviv
Billiards in convex domains
Lex
Schrijver
Horst-Wagon Saal H1012
The partially disjoint paths problem
Christof
Schütte
ZIB
Model reduction for stochastic processes exhibiting multiple scales
Philippe
Michel
EPFL
Applied l-adic Cohomology
2015
Julia
Wolf
U Bristol
Quadratic Fourier Analysis
Emo
Welzl
ETH Zurich
Crossing-Free Perfect Matchings, etc., on Wheel Point Sets
Christian
Haase
FU Berlin
Hodge Numbers & Lattice Points
Pierre
Cartier
U Paris-Diderot and IHÉS
Towards a Galois theory of transcendental numbers
Geordie
Williamson
MPI Bonn
Mathematics in light of representation theory
Benjamin
Sudakov
ETH Zürich
Induced matchings, arithmetic progressions and communication
John
Walsh
U British Columbi
Some remarks on stochastic partial differential equations
Nathalie
Wahl
U Copenhagen
Stabilizing symmetries
Nina
Gantert
Random media and percolation
Peter
Bürgisser
TU Berlin
Geometry, invariants, and the elusive search for complexity lower bounds
Joseph M.
Landsberg
Texas A&M U
What can geometry tell us about computer science?
Angelika
Steger
ETH Zürich
The determinism of randomness and its use in combinatorics
Joachim
Weickert
Image Compression with Differential Equations
2014
Alberto
Abbondandolo
Ruhr U Bochum
A promenade on the two-sphere
Anders
Björner
Random walks on complex hyperplane arrangements and self-organising libraries
Stephanie B.
Alexander
UIUC
Alexandrov Geometry
Martin
Henk
TU Berlin
Geometry of Numbers: Convex Bodies and Lattice Points
Volker
Remmert
U Wuppertal
Visual representations of the mathematical sciences in early modern Europe
Myfanwy
Evans
U Erlangen
Geometry... in a material world...
Christian
Bär
U Potsdam
Positive curvature in 4 dimensions
Rahul
Pandharipande
ETH Zurich
Cohomology of the moduli space of curves
Leszek F.
Demkowicz
Finite elements for Maxwell equations
Craig S.
Kaplan
U Waterloo
Metamorphoses and deformations of tilings
Alina
Marian
Northeastern U
Volumes of moduli spaces – will take place within the framework of the MAF Intensive Course @ HU
Mario
Arioli
A gentle introduction to complex and quantum graphs and their applications
Eduard
Feireisl
Czech Academy of Sciences
Interaction of scales in mathematical fluid dynamics
Lilian
Pierce
Bringing the Carleson operator out of Flatland
Jeff
Weeks
Visualizing Four Dimensions
Benson
Farb
U Chicago
Braids, homology, permutations and polynomials – ZIB lecture hall
2013
Felix
Otto
MPI Leipzig
Playing with Partial Differential Equations
Martin
Burger
U Münster
Patterns and Minimal Models
Boris
Springborn
TU Berlin
Discrete conformal maps
László
Lovász
Eötvös Loránd University Budapest
and
Katalin
Vesztergombi
Eötvös Loránd University Budapest
Limits of graphs and nondeterministic property testing
Ileana
Streinu
Smith College
Degrees of Freedom
Barbara
Wohlmuth
TU Munich
Numerical analysis for computational science
Mireille
Bousquet-Melou
LaBRI
Self-avoiding Walks
Etienne
Emmrich
TU Berlin
On monotone operators, evolution equations, and existence via discretization
Louis H.Y.
Chen
National University of Singapore
From functional equations to probability approximations: The amazing Stein's Method
László
Székelyhidi
U Leipzig
Bending Surfaces and Turbulent Energy Cascades
Reinhold
Schneider
TU Berlin
Hierarchical Tensor Product Representations
Dorothy
Buck
Imperial College London
DNA knots: Why they're (biologically) important and (mathematically) interesting
Özlem
Imamoglu
ETH Zurich
On Klein's j-invariant
2012
Jason
Cantarella
U Georgia
The geometry and topology of random polygons
Alan
Rendall
MPI
Spacetime singularities and heteroclinic chains
Opening of the
Stochastic Analysis
Joachim
Schwermer
U Wien
On arithmetically defined hyperbolic 3-manifolds
Ulrich
Pinkall
TU Berlin
Decomposing Smoke into Smoke Rings
Peter
Mörters
U Bath
Tossing coins, matching points, and shifting Brownian motion
Martin
Bridson
Oxford U
Discrete groups: A story of geometry, complexity, and imposters
Tom
Banchoff
Brown U
Folds, Intersections and Inflections for Smooth and Polyhedral Surfaces: Distinguishing Cylinders from Möbius Bands
Karen
Vogtmann
Cornell U
Outer Spaces
Edriss
Titi
UC Irvine
The Navier-Stokes, Euler and Other Related Equations
Michael
Kupper
HU Berlin
Risk, model uncertainty and nonlinear expectations
Penny
Haxell
U Waterloo
Independent transversals, or, choosing faculty committees
Gitta
Kutyniok
TU Berlin
Imaging Science meets Compressed Sensing
2011
James
Sethian
UC Berkeley
Advances in Advancing Interfaces: Efficient Algorithms for Inkjet Plotters, Coating Rollers, Semiconductors, Retinopathy Diagnosis, and Chemical Pathway Analysis
Igor
Rivin
Temple U
Probability, geometry and algorithms of matrix groups
Ingrid
Daubechies
Duke University
Distinguishing the "hand" of the master?
Hannah
Markwig
U Saarland
What corresponds to Broccoli in the real world?
Charlie
Elliott
U Warwick
Evolving interfaces and surfaces
Wendelin
Werner
U Paris Sud - Orsay
Random surfaces and their geometry
Christian P.
Robert
On Approximate Bayesian Computation (ABC) methods
Bernd
Sturmfels
UC Berkeley
The Central Curve in Linear Programming
Valery
Alexeev
U Georgia
Polytopes, tilings, and compact moduli of algebraic varieties
Ulisse
Stefanelli
IMATI
Evolution = Minimization ?
Dan
Spielman
Yale U
Approximating Graphs and Solving Systems of Linear Equations
John M.
Sullivan
TU Berlin
Ropelength criticality for knots and links
Katrin
Bringmann
U Köln
Mock theta functions, probability and cellular automata models
David P.
Williamson
Cornell U
What Computers Can Compute
Bernd
Wegner
Zentralblatt für Mathematik
Zentralblatt MATH - the gateway to mathematics literature
Jens
Funke
U Durham
Hecke and Langlands - A little bit of number theory
2010
Rafael
Nunez
UCSD
What then is Mathematics? A view from Cognitive Science
Joel
Spencer
NYU
Der Zauberer von Budapest - Paul Erdös and the Rise of Discrete Mathematics
Jean-Benoît
Bost
U Paris-Sud Orsay
The work of Jacobi on elliptic functions: an introduction for today's mathematician
Marie-Françoise
Roy
U Rennes
Certificates of positivity
Don
Zagier
MPI Bonn
Mathematics in Another World - A report on Japanese mathematics in the Edo period
Aner
Shalev
Hebrew U Jerusalem
Words: From Number Theory to Finite Simple Groups
Alison
Etheridge
U Oxford
The pain in the torus: modelling populations in a spatial continuum
Doron
Zeilberger
Rutgers U
The Number of Isomers of Nicotine
Ciro
Ciliberto
U Roma 2 - Tor Vergata
Geometric aspects of polynomial interpolation in more variables
Marcus
du Sautoy
U Oxford
Through the looking glass: groups from a number theoretic perspective
Andrew
Stuart
U Warwick
Inverse Problems
Lex
Schrijver
CWI and U Amsterdam
Bounding Stable Sets in Graphs and Codes
Victor
Buchstaber
Manchester/Moscow
Combinatorics of simple polytopes and differential equations
Felix
Mühlhölzer
Göttingen
Surprises in Mathematics
Martin
Rumpf
Bonn
Geodesics in the the space of shapes
2009
Peter K.
Friz
TU Berlin
Rough paths and the Gap Between Deterministic and Stochastic Differential Equations
Jack
van Wijk
Eindhoven
Knots, Maps, and Tiles: Three Mathematical Visualization Puzzles
Klaus
Hulek
Hannover
Geometry of Moduli Spaces
Ragni
Piene
Oslo
Counting curves: the hunting of generating functions
Andreas
Griewank
HU Berlin
Derivative based Optimization
Cedric
Villani
ENS Lyon/Princeton
Legacy of Boltzmann
Margaret
Wright
New York University
Non-derivative optimization: Mathematics, engineering, or heuristics?
Albert
Shiryaev
Steklov Institute of Mathematics
From von Mises' COLLECTIVE to Kolmogorov's COMPLEXITY
Keith
Ball
UC London
The second law of probability: entropy growth in the central limit theorem
Benedict
Gross
Harvard
Values of zeta functions at negative integers and the dimensions of spaces of modular forms
Michael
Hintermüller
HU Berlin
Use Level Sets and Relax!
Gil
Kalai
Hebrew University Jerusalem
Helly-type theorems
Annette
Werner
Frankfurt
Bruhat-Tits buildings
Susanne
Albers
Freiburg
Network Design Games
2008
Jay
Jorgenson
City College of New York
Identities in Euclidean and Hyperbolic Geometry which follow from Existence and Uniqueness Theorems
Wolfgang
Lück
Münster
Topological Rigidity
Michael
Rapoport
Bonn
On the zeta function of Shimura varieties
Martin
Skutella
TU Berlin
Flows over time - classical and more recent results
Norbert
Schappacher
Strasbourg
Political Space Curves
Eva
Bayer-Fluckiger
EPFL
The Euclidean division
Hans
Föllmer
HU Berlin
Bright spotlights, dark shadows: probabilistic aspects of financial risk
Wolfgang
Dahmen
Aachen
Compressed Sensing
Gerard
van der Geer
Amsterdam
Modular forms and counting curves over finite fields
Shmuel
Friedland
Chicago/Berlin
Counting matchings in graphs, with applications to the monomer-dimer models
Ruth
Kellerhals
Fribourg
Hyperbolic isometry groups and small volume
Rupert
Klein
FU Berlin
Multiple scales in Weather and Climate
2007
Ilka
Agricola
HU Berlin
The E8 challenge
Claus
Michael Ringel
Bielefeld
Invariant subspaces of nilpotent operators
Rainer
Weissauer
Heidelberg
Coverings of Riemann surfaces and a new kind of Galois groups
Wendelin
Werner
Université Paris Sud
Coloring at random
Herbert
Edelsbrunner
Duke/Berlin
Measuring scale before simplification
Jan
Kristensen
Oxford/HU Berlin
The Problem of Regularity in the Calculus of Variations
Bernd
Sturmfels
Berkeley/Berlin
Algebraic Degree of Semidefinite Programming
Albert
Cohen
Harmonic Analysis and Image Processing
Andrei
Okounkov
Princeton
Box counting
Bill
Casselman
UBC, Vancouver
An illustrated history of geometry
Alexander
Barvinok
U Michigan, Ann Arbor
The asymptotic equivalence of counting and optimization
Olga
Holtz
TU Berlin
How to multiply matrices fast (and why bother)?
George
Francis
U Illinois, Urbana-Champaign
Designing computer animations with chalk and blackboard
Eberhard
Knobloch
Euler and Leibniz on the infinite (celebrating Euler year 2007)
Martin
Aigner
FU Berlin
Volumes, polyhedra, and prime numbers: A common combinatorial look
2006
Karl
Sigmund
University of Vienna
Gödel's Vienna (celebrating the end of the Gödel year)
Robert
Bryant
Duke University
Aufwiedersehen Surfaces, Revisited
Hélène
Esnault
Congruences for the number of rational points of varieties defined over finite fields
Peter
Schröder
CalTech
Discrete Exterior Calculus with an application to circulation preserving simplicial fluid simulation