I am a postdoctoral researcher in the Browning Group at the Institute for science and Technology Austria. Before I was a Ph.D. candidate at Leiden University under the supervision of dr. Martin Bright.
My research is on arithmetic geometry as I apply geometric techniques to study questions in number theory. I am for example interested in local to global principles such as the Hasse principle and several forms of approximation to both rational and integral points, obstructions to these principles (the Brauer–Manin obstruction, to name one), the counting of points of bounded height, but also effective techniques for points on curves and surfaces.
I am fascinated by the endless geometric techniques one can use to study some obvious and seemingly simple questions in number theory.
Julian Lyczak
jlyczak (at)
IST Austria
Am Campus 1
A – 3400 Klosterneuburg


Scientific articles: Theses: Here you can find a list of errata of the following notes: Other people's scientific articles with a (minor) contribution from me: Miscellaneous: The "Vakidioot" is the monthly magazine of A-Eskwadraat, the study association for mathematics in Utrecht. "Euclides" is a magazine for high school mathematics teachers. "Pythagoras" is a two-monthly magazine for high school students.



Autumn 2020 Spring 2020 Autumn 2019 Spring 2019: Spring 2018: Autumn 2017: Spring 2017: Spring 2016: Spring 2015: Older talks (at the University of Utrecht):

Seminars, conferences etc.

Upcoming: Current: Ongoing: Autumn 2019 Spring 2019 Continuous seminars and colloquia at Leiden and in The Netherlands I attended: Autumn 2018: Autumn 2018: Spring 2018: Autumn 2017: Spring 2017: Autumn 2016: Spring 2016: Autumn 2015: Spring 2015: Older seminars (at the University of Utrecht):


Spring 2018: Autumn 2017: Spring 2017: Autumn 2016: Spring 2016: Autumn 2015: Spring 2015:


A list of links to some of my personal interests: