My name is Florian Sprung. Some people also call me Ian Sprung.

My work is in arithmetic geometry and number theory.

You can reach me at ian.sprung (at) Here is my teaching page.


with Francesc Castella, Mirela Ciperiani, and Christopher Skinner


  • Integral Euler Systems and Main Conjectures

RIMS Bessatsu

with Ken Ono and Larry Rolen, published in Advances in Mathematics

published in Research in Number Theory

published in Algebra and Number Theory

published in Journal für die reine und angewandte Mathematik (Crelle's Journal)

published in RIMS Bessatsu

published in the Journal of Number Theory

(The video features Shinichi Kobayashi and Robert Pollack)

published in the Proceedings of the 6th Kinosaki Shinjin Seminar

Brief bio:

I am currently a tenure-track assistant professor at Arizona State University. Until 2017, I was a Veblen Research Instructor at Princeton University and the IAS. In 2017, I visited Barcelona Tech for a few months. Before my Princeton years, I was at Brown, where I received my PhD in 2013. I also studied at the University of Tokyo for my MSc and at Columbia as an undergraduate. Before getting into academia, I worked at the Kirakuen retirement home.

My Erdős number is three.

Here is an essay by Kodaira on how to read: