Mathematics seminars

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Mathematics at the interface seminars

Time and day: Our regular seminar slot is 2pm - 3pm on Wednesday during term.
Venue: 39 AA 04.

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Date: 21.09.2026, 3pm
Venue: 39 AA 04.
Speaker: Alex Mahalov, Wilhoit Foundation Distinguished Professor, Arizona State University
Title: Doppler Effects Associated with Nonlinear Motion in 4D Spacetime: Mathematics, Physics and Modern Applications
Abstract: Christian Andreas Doppler was a native of Salzburg and a genius in mathematics and physics. His discovery wields a great influence on the world today: the Doppler effect makes it possible for modern medicine to investigate processes in the human body, and even the theory of an expanding universe is based on Doppler's discovery which also was used in Einstein's work. In this talk intended for a general audience, I will discuss Doppler's life and scientific contributions. I will also present recent mathematical developments in my group focusing on the nonlinear Doppler effects: dynamic Doppler spectrum induced by nonlinear motion in 3D, Frenet-Serret geometry and relativistic effects in 4D spacetime. Joint work with Bryce Barclay.