My name is Florian Sprung. Many people also call me Ian Sprung. My work is in arithmetic geometry and number theory.

I am a tenure-track assistant professor at Arizona State University. My Erdős number is three. Here is my vita.

You can reach me at ian.sprung (at)

Here is my teaching page.


  • Consequences of the functional equation for pairs of p-adic L-functions

with Cédric Dion, on the anvil

with Antonio Lei, to appear in Israel Journal of Mathematics

with Francesc Castella, Mirela Ciperiani, and Christopher Skinner, preprint


  • Integral Euler Systems and Main Conjectures

in press, RIMS Bessatsu B72, 135-145

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

שפרונג און א קאנאדישער בייםPhoto credit: Antonio Lei

Before getting into academia, I worked at the Kirakuen retirement home.

Here is an essay by Kodaira on how to read.