The study of automorphism groups of first order structures as topological groups, for examples, uses tools from descriptive set theory leading to pure set theoretic questions. The goal of this project ...

Mr. Chopra candidly confesses to be especially prone to anxiety. What one might call “automorphism”—seeing others in the images of ourselves—seems to have led him to overestimate how deep and ...

The theory of group actions is interspersed throughout the book, as appropriate to the development of the graph story, and there are separate chapters treating different research directions, for ...