Sean Cleary

Roles and Affiliations: Sean Cleary is a Professor of Mathematics at The City College of New York (CCNY) and a Graduate Faculty member at the CUNY Graduate Center. He serves as Assistant Chair and Major Advisor in the Department of Mathematics. His office is located in Marshak 301C, and he can be reached at scleary@ccny.cuny.edu.

Education:

• Ph.D., Mathematics, University of California, Los Angeles
• A.B., Mathematics and Physics, Cornell University

Research Interests: Cleary's research focuses on geometric and combinatorial group theory, spaces of trees, and algorithms for trees. He explores Thompson's groups and their properties, including rotation distances between trees and metric structures on tree spaces. His work often intersects computational mathematics and phylogenetics, with applications to algorithm design and geometric dynamics.

Teaching: Recent courses include Calculus III with Vector Analysis (Math 213), Differential Geometry (Math 461/A6100), and advanced topics in group theory. He emphasizes rigorous mathematical training and pedagogical innovation, including the use of computational tools like Mathematica.

Professional Contributions: Cleary is a member of the New York Group Theory Cooperative and contributes to the calculus.org editorial board. His research has been supported by collaborative efforts within the CUNY system, and he actively participates in academic service roles at CCNY.