Mark Feshbach University of Minnesota How to split a classifying space of a finite group Abstract: The proof of the Segal Conjecture has had many consequences. One of them is an algebraic model for the space of stable maps from the classifying space of a finite group to that of another. This in particular allows one to split classifying spaces into indecomposable pieces. Representation theory plays a large role in this, as does subgroup structure. Although the final answer is quite complicated the general picture is quite pleasing. Some of these ideas can be generalized to compact Lie groups.