Rate My Professor Felix Schwenniger

Felix Schwenniger is an Associate Professor in the Department of Applied Mathematics at the University of Twente, where he has been affiliated since May 2019. He served as Assistant Professor from 2019 to 2022 before his promotion to Associate Professor in 2022. Since October 2025, he chairs the Mathematics of Systems Theory (MAST) group within the Faculty of Electrical Engineering, Mathematics and Computer Science. Prior to his permanent position at Twente, Schwenninger held postdoctoral positions at the University of Wuppertal from 2015 to 2016 and at the University of Hamburg from 2016 to 2019. He also served as a temporary professor (Vertretungsprofessor) at the University of Wuppertal in Fall 2018/19. His academic background includes BSc and MSc degrees in mathematics from the Vienna University of Technology (TU Wien) earned between 2006 and 2011, during which he participated in an Erasmus exchange at Lund University in 2010-2011. Schwenninger obtained his PhD from the University of Twente in 2015, supervised by Professor Hans Zwart, with a thesis entitled "On Functional Calculus Estimates".

Schwenninger's research focuses on functional analysis, particularly operator theory, with applications to the analysis and control of partial differential equations in infinite-dimensional systems. His interests include semigroup theory, functional calculus, input-to-state stability of infinite-dimensional systems, funnel control, optimization of constants, and Crouzeix's conjecture. He has produced 78 research outputs, including publications in leading journals such as SIAM Journal on Control and Optimization, Journal of Differential Equations, Automatica, and Systems & Control Letters. Among his most cited works are "Infinite-dimensional input-to-state stability and Orlicz spaces" (2018, with B. Jacob, R. Nabiullin, J.R. Partington; 135 citations), "On continuity of solutions for parabolic control systems and input-to-state stability" (2019, with B. Jacob, H. Zwart; 73 citations), "Input-to-state stability for parabolic boundary control: linear and semilinear systems" (2020; 62 citations), and "Funnel control for a moving water tank" (2022, with T. Berger, M. Puche; 55 citations). Schwenninger's scholarship has garnered over 737 citations according to Google Scholar. He serves as Associate Editor for Optimal Control Applications and Methods since 2021 and is scheduled as a plenary speaker at IWOTA 2026.