**Please note this seminar is in-person only SMRI ’What is ...?’ Seminar: ’What is ...symmetry breaking in geometry?’ Udo Hertrich-Jeromin (Vienna University of Technology) Thursday 14th September 1:00-2:00pm (AEST) Carslaw 375 Abstract: "Symmetry breaking" has been a key notion in physics since well over a century. We shall explore the question whether certain phenomena in geometry may be considered as "symmetry breaking" in geometry in a similar vein, pursuing ideas first formulated well over a century ago in the "Erlanger programme" of F Klein. ---- Please join us after the seminar for SMRI afternoon tea, 2:00-2:45pm every Thursday on the SMRI Terrace (accessed through A14-04-L4.36) ---- Other upcoming SMRI events can be found here: https://mathematical-research-institute.sydney.edu.au/news-events/ SMRI YouTube Channel: https://youtube.com/@SydMathInst