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.



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: