24.06.2026
DMS - Prof. Dr. Karlheinz Gröchenig (Universität Wien)
Dresdner Mathematisches Seminar
Prof. Dr. Karlheinz Gröchenig
Universität Wien, Fakultät Mathematik
How well does the discrete Fourier transform approximate
the Fourier transform on R?
In order to compute the Fourier transform of a function f on the real line numerically, one samples f on a grid and then takes the discrete Fourier transform. We derive exact error estimates for this procedure in terms of the decay and smoothness of f. The analysis provides an asymptotically optimal recipe of how to relate the number of samples, the sampling interval, and the grid size.
This is joint work with Martin Ehler and Andreas Klotz.
Mittwoch, 01.07.2026, 17:00 Uhr – Willers-Bau, Raum A 124
Leitung: Prof. Dr. Ralph Chill
Vor dem Vortrag findet ab 16:30 Uhr ein gemeinsames Kaffee-/Teetrinken vor dem Vortragsraum WIL A 124 statt.