Algebra Seminar - Frauke Bleher; University of Iowa Department of Mathematics

Title: Number fields with small discriminants

Abstract: The discriminant d_N of a number field N is a basic invariant of N. The smaller d_N is, the more elements there are in the ring of integers O_N of N that have a given bounded size. This is relevant, for example, to cryptography using elements of O_N. In this talk, I will first introduce the relevant definitions. Then I will describe work with Ted Chinburg on the explicit construction of an infinite family of number fields N having d_N^{1/[N:Q]} bounded by a constant times [N:Q]^e for some e < 1. This answers a question by Peikert and Rosen from 2006.

Wednesday, September 9, 2026 3:30pm to 4:20pm
Jessup Hall
346
5 West Jefferson Street, Iowa City, IA 52240
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Individuals with disabilities are encouraged to attend all University of Iowa–sponsored events. If you are a person with a disability who requires a reasonable accommodation in order to participate in this program, please contact Frauke Bleher in advance at 3193350714 or frauke-bleher@uiowa.edu.