Colloquium
The Department of Mathematics and Systems Analysis organizes regular colloquia on topics in mathematics and systems analysis for a non-specialist audience. Informal discussion continues after the colloquium in the common room.
- 14.2. 15:15 Prof. Anita Schöbel (RPTU Kaiserslautern and Fraunhofer ITWM): Robust multi-objective optimization – U6 (U149)
Most real-world optimization problems contain parameters which are not known at the time a decision is to be made. In robust optimization one specifies the uncertainty in a scenario set and tries to hedge against the worst case.
Classical robust optimization aims at finding a solution which is best in the worst-case scenario. It is a well-studied concept but it is known to be very conservative: A robust solution comes with a high price in its nominal objective function value. This motivated researchers to introduce less conservative robustness concepts in the last decade. Moreover, many real-world problems involve not only one, but multiple criteria. While robust single-objective optimization has been investigated for 25 years, robust multi-objective optimization is a new field in which already the definition of "robust" is a challenge.
In the talk, several robustness concepts will be discussed and
illustrated at applications from public transport.
Titles and abstracts of colloquia before 2023
Spring semester 2020
- February 25, 15:15-16:15, hall U5: Prof. Tuomas Hytönen (University of Helsinki) “Commutators and Jacobians”
- January 28, 15:15-16:15, hall U5: Prof. Volker Mehrmann (TU Berlin) "Stability analysis of energy based dynamical system models"
Fall semester 2019
- November 26, 15:15-16:15, hall U6: Prof. Kaisa Nyberg (Aalto University) "Cryptographic nonlinearity criteria"
- October 29, 15:15-16:15, hall U6: Prof. Elina Robeva (University of British Columbia) "Maximum Likelihood Estimation of Totally Positive Densities"
- October 15 (postponed from September 24), 15:15-16:15, hall M1: Prof. Fabricio Oliveira (Aalto University) "Optimisation under uncertainty for real-world production systems: theoretical aspects and practical challenges"
Spring semester 2019
- May 15th, 15:15 -16:15, hall M1: Professor Aldo Conca (University of Genova, Italy) "Introduction to Gröbner bases."
- April 23rd, 15:15 -16:15, hall M1: Professor Vitaly Skachek (Tartu University) "Constructing Asynchronous Batch Codes using Hypergraphs."
- March 26th, 16:15-17:15, hall M1: Prof. Paavo Pylkkänen (University of Helsinki): "Explaining consciousness in terms of information."
- February 26th, 15:15-16:15, hall M1: Prof. Marcus Greferath (Aalto University): "Spectral Methods for Coding Theory in a non-commutative Setup."
- January 29th, 15:15 - 16:15, hall A2: Prof. Jaakko Lehtinen (Aalto University): "Simulation + machine learning = interpretable, less data hungry AI?"
Fall semester 2018
- November 27th, 15-16, hall E: Prof. Tuomo Kuusi (University of Helsinki): "Quantitative Stochastic Homogenization and Large-Scale Regularity"
- October 30th, 15-16, hall E: Prof. Chris Brzuska (Aalto University): "Proof Theory for Cryptography"
- September 25th, 15-16, hall E: Prof. Matthieu Jonckheere (University of Buenos Aires): "Distance learning using Euclidean percolation: Following Fermat's principle"
Spring semester 2018
- January 30th, 15-16, hall D : Prof. Petteri Kaski (Aalto Univeristy) : "Proofs and computation"
- February 27th, 15-16, hall D : Acadamy Research Fellow Kaisa Matomäki (University of Turku) : "Correlations of arithmetic functions"
- March 27th, 15-16, hall D : Prof. Heikki Haario (Lappeenranta University of Technology): "Statistical invariance in chaos and random patterns"
- April 24th, 15-16, hall D : Prof. Clément Hongler (École polytechnique fédérale de Lausanne): "Statistical Field Theory and the Ising Model"
Fall semester 2017
- September 26th, 15-16, hall M1 : Prof. Daniele Boffi ( Università di Pavia, Aalto University ) : "Finite element approximation of resonant modes for the Maxwell cavity problem"
- October 31st, 15-16, hall U1 : Prof. Lothar Nannen (TU Wien) : "Numerical methods for resonance problems in open systems"
- November 28th, hall U1 : Prof. Kari Astala (Aalto University) : "Random tilings, variational problems and the Beltrami equation"
Spring semester 2017
- January 31st, 15-16, hall U1 : Jarkko Kari (University of Turku) : "An Algebraic Geometric Approach to Multidimensional Symbolic Dynamics"
- February 28th, 15-16, hall M1 : Eero Saksman (University of Helsinki) : "The Riemann zeta function meets Gaussian multiplicative chaos"
- March 28th, 15-16, hall M1 : Christian Haase (Freie Universität Berlin) : "Finiteness Theorems for Lattice Polytopes"
- April 25th, 15-16, hall M1 : Thomas Britz (UNSW Sydney) : "A Nice Proof of Wei's Duality Theorem"
- May 2nd, 15-16, hall M1 : David Rios Insua (ICMAT-CSIC and Royal Academy of Sciences, Spain) : "Adversarial Risk Analysis: Concepts, Applications and Challenges"
Fall semester 2016
Spring semester 2016
- January 26th, 15-16, hall M1:Prof. Davy Paindavei (Université Libre de Bruxelles) : Inference on the mode of weak directional signals: a Le Cam perspective on hypothesis testing near singularities
- February 23rd, 15-16, hall M1: Prof. Jeffery M. Keisler (Aalto University, University of Massachusetts Boston) : A decision analytic modification to deal with uncertain targets in project management
- March 31th, 15-16, hall M1 : Prof. René Scoof (Università di Roma “Tor Vergata”) : Lagrange's theorem for finite algebraic groups
- April 26th, 15-16, hall M1 : Prof. Giuseppe Mingione (Università di Parma) : Some regularity problems in the calculus of variations
Fall semester 2015
- September 29, 15-16, hall M1: Prof. Raimo P. Hämäläinen (Aalto University) : Behavioural operational research.
- October 27, 15-16, hall U1: Prof. David Radnell (Aalto University) : Some new developments in quasiconformal Teichmueller theory.
- November 24th, 15-16, hall U1: Ph.D Jukka Keränen (Aalto Univerisity) : Group Representations in Number Theory: An Introduction to the Langlands Program
Spring semester 2015
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