Rate My Professor Stefan Kahler

Stefan Kahler earned his Dr. rer. nat. degree from Technische Universität München in 2016, with Prof. Rupert Lasser as advisor. His dissertation, "Characterizations of Orthogonal Polynomials and Harmonic Analysis on Polynomial Hypergroups," addresses topics in orthogonal polynomials and harmonic analysis. His research encompasses orthogonal polynomials, polynomial hypergroups, sieved random walk polynomials, q-Legendre polynomials, and linearization properties. Key publications include "Expansions and Characterizations of Sieved Random Walk Polynomials" in SIGMA 19 (2023), 103; "Dual spaces vs. Haar measures of polynomial hypergroups" in Journal of Approximation Theory (2025); "Harmonic analysis of little q-Legendre polynomials" in Journal of Approximation Theory (2023); "Nonnegative and Strictly Positive Linearization of Jacobi and Generalized Chebyshev Polynomials" in Constructive Approximation (2021); and arXiv preprints such as arXiv:2306.16411v2, arXiv:2212.11229v3, arXiv:2008.08079v3, arXiv:1812.05542v2, and arXiv:1806.00339 on related mathematical topics.