Dr. Torsten TrimbornInstitut für Geometrie und Praktische MathematikRWTH Aachen Templergraben 55 52056 Aachen Germany office: Hauptgegbäude 127 phone: +49 241 8090 651 email: trimborn_AT_ igpm.rwthaachen.de

Research

My research mainly focuses on the kinetic description and modeling of interacting multiagent systems in socioeconomic applications. Mesoscopic modeling is a powerful tool to describe collective phenomena and to gain insights into the large time behavior of such multiagent systems. My current interest is to discover novel optimal control aspects in a multiagent environment and especially the corresponding kinetic limit. In my opinion this is one of the major challenges in the application of kinetic theory onto socialeconomic aspects since intelligent beings are no physical particles.
Research Interests
 Kinetic and Mean Field Modeling
 Mean Field Games
 Econophysics, particularly AgentBased Models
 Uncertainty Quantification
 Monte Carlo Methods
Publications
 T. Trimborn, P. Otte, S. Cramer, M. Beikirch, E. Pabich, M. Frank, SABCEMMA Simulator for AgentBased Computational Economic Market Models, to appear in Computational Economics, 2019
 T. Trimborn, L. Pareschi, M. Frank, Portfolio Optimization and Model Predictive Control: A Kinetic Approach, Vol. 24, Discrete Cont. Dyn. B, 2019
 T. Trimborn, A Macroscopic Portfolio Model: From Rational Agents to Bounded Rationality, Mathematics and Financial Economics, 2019
 T. Trimborn, M. Frank, S. Martin, Mean Field Limit of a Behavioral Financial Market Models, Vol. 505, Physica A, 2018
Preprints
 M. Herty, T. Trimborn, G. Visconti, Kinetic Theory for Residual Neural Networks, Preprint, 2020
 C. Lax, T. Trimborn, From Disequilibrium Markets to Equilibrium, Preprint, 2019
 M. Frank, M. Herty, T. Trimborn, Microscopic Derivation of Mean Field Game Models, Preprint, 2019
 M. K. Banda, M. Herty, T. Trimborn, Recent developments in controlled crowd dynamics, Preprint, 2019
 S. Cramer, T. Trimborn, Stylized Facts and AgentBased Modeling, Preprint, 2019
 M. Beikirch, S. Cramer, M. Frank, P. Otte, E. Pabich, T. Trimborn, Robust Mathematical Formulation of AgentBased Computational Economic Market Models, Preprint, 2019
 M. Beikirch, S. Cramer, M. Frank, P. Otte, E. Pabich, T. Trimborn, Simulation of Stylized Facts in AgentBased Computational Economic Market Models, Preprint, 2018
Projects
 Kinetic Methods for Data Science and Deep Learning The goal of this project is to use kinetic theory to gain novel insights into data science applications. Examples include large data clustering or inverse problems. In deep learning we are especially interested to understand the good performance of neural networks in many data science applications.
 Kinetic modeling of financial markets Kinetic theory may help to analyze novel financial marekt models where investors are described as heterogeneous interacting agents. Such novel models help to gain insights in the creation of financial crashes. Furthermore, we focus on the connection between the design of the microscopic financial agents and macroscopic behaviour of the kinetic model. We hope to investigate new answers regarding the relationship between the psychological behaviour of investors and empirical observations on financial markets, known as stylized facts.
 Computational methods for agentbased financial market models One novel and promising modeling approach of financial markets are agentbased computational financial market models, which are part of the research field econophysics. In contrast to classical models investors are modeled by heterogeneous interacting agents. These large dynamical systems are usually analyzed by means of Monte Carlo simulations. In this project we apply modern mathematical methods e.g. sparse grid collocation onto such agentbased models in order to quantify the simulation output and to understand the impact of several input parameters with respect to the appearance of stylized facts. Recently, we have introduced the simulator SABCEMM for such agentbased financial market models.