Robert MacPherson and arithmetic groups
arXiv:math/0603385
Abstract
We survey contributions of Robert MacPherson to the theory of arithmetic groups. There are two main areas we discuss: (i) explicit reduction theory for Siegel modular threefolds, and (ii) constructions of compactifications of locally symmetric spaces. The former is joint work with Mark McConnell, the latter with Lizhen Ji.
Dedicated to Robert MacPherson on the occasion of his 60th birthday