Frontmatter -- Preface -- Table of Contents -- Contributors -- Introductory address -- After-dinner speech / Tietz, Horst -- On the solvability of the kernel of any orthogonal decomposition / Tiep, Pham Huu -- The beginnings of modular Lie algebra theory / Kostrikin, Alexei I. -- Computing invariants of algebraic number fields / Pohst, Michael E. -- Kristallographische Gruppen / Plesken, Wilhelm -- Endliche Fastkörper und Zassenhausgruppen / Bender, Helmut -- On the arithmetic of commutative group rings / Hoechsmann, Klaus