Homotopy type and v1-periodic homotopy groups of p-compact groups Donald M. Davis dmd1@lehigh.edu Lehigh University, Bethlehem, PA 18015 Abstract: We determine the v1-periodic homotopy groups of all irreducible p-compact groups. In the most difficult, modular, cases, we follow a direct path from their associated invariant polynomials to these homotopy groups. We show that, with several exceptions, every irreducible p-compact group is a product of explicit spherically-resolved spaces which occur also as factors of p-completed Lie groups.