Hi everyone,
Our speaker tomorrow is James Rickards from CU Boulder. The seminar starts at 11am in PDL C-401, and we'll go to lunch with the speaker after the talk.
I look forward to seeing you there!
Title: The not-so-local-global conjecture
Abstract: I will describe new obstructions found for Apollonian circle packings, which contradicts the local-global conjecture for many configurations. These obstructions come from quadratic and quartic reciprocity, and we expect similar obstructions to exist in other thin group orbits. Based on computational evidence, a new conjecture is formulated. This is joint work with Summer Haag, Clyde Kertzer, and Katherine E. Stange.
-- Bianca Viray (
she/
her)
Craig McKibben and Sarah Merner Professor of Mathematics
University of Washington
Seattle, WA 98195