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Einladung zum Mathematischen Kolloquium
Mittwoch, den 03.06.2026,Seminarraum A (R209),Institut für Mathematik
Professor Dr. Mario Ohlberger von der Universität Münster spricht über das Thema: "Reduced Order Surrogate Models for PDE-Constrained Optimization and Inverse Problems"
Einladung zum Mathematischen Kolloquium
Mittwoch, den 03.06.2026, Seminarraum A (R209), 17 Uhr s.t.
Herr Professor Dr. Mario Ohlberger von der Universität Münster, Angewandte Mathematik
spricht über das Thema:
"Reduced Order Surrogate Models for PDE-Constrained Optimization and Inverse Problems"
Abstract: Classically, model order reduction for parameterized systems is based on a so-called offline phase, where reduced approximation spaces are constructed and the reduced parameterized system is built, followed by an online phase, where the reduced system can be cheaply evaluated in a multi-query context. In this talk, instead, we follow an active learning or enrichment approach where a multi-fidelity hierarchy of reduced order models is constructed on-the-fly while exploring a parameterized system.
To this end we focus on learning based reduction methods in the context of PDE constrained optimization and inverse problems and evaluate their overall efficiency. We discuss learning strategies, such as adaptive enrichment within a trust region optimization framework as well as a combination of reduced order models with machine learning approaches.
Concepts of rigorous certification and convergence will be presented, as well as numerical experiments that demonstrate the efficiency of the proposed approaches.
Bereits ab 16:30 Uhr gibt es für alle Interessierten die Möglichkeit zu einem Gespräch bei Kaffee und Tee im Bibliothekszimmer (R110).
Link für die online Teilnahme am Kolloquium:
https://webconf.tu-clausthal.de/rooms/ola-qyv-ml6-ivd/join