# Heuristics for lambda Invariants

 JOINT IAS/PU NUMBER THEORY SEMINAR Topic: Heuristics for lambda Invariants Speaker: Sonal Jain Affiliation: New York University Date: Thursday, February 17 Time/Room: 4:30pm - 5:30pm/S-101 Video Link: https://video.ias.edu/nt/jain

The $\lambda$-invariant is an invariant of an imaginary quadratic field that measures the growth of class numbers in cyclotomic towers over the field. It also measures the number of zeroes of an associated $p$-adic L-function. In this talk, I will discuss the following question: How often is the p-adic $\lambda$-invariant of an imaginary quadratic field equal to $m$? I'll explain how one can model this question by statistics of $p$-adic random matrices, and show one can test this model by computing $\lambda$-invariants rapidly. This is joint work with Jordan Ellenberg and Akshay Venkatesh.