This paper will appear in Journal fur die reine und angewandte Mathematik
(Crelle). The paper investigates non-torsion elements in the algebraic
K-theory of a ring of integers O in a number field. The main theorem asserts
that the kernel of the reduction map from the odd dimensional K-groups of O
to the (infinite) product of the corresponding K-groups of the residue fields
is finite. This implies interesting results on the understanding of the
homotopy type of the space obtained by performing the plus construction on
BSL(O): in particular, we study its Postnikov invariants and the Hurewicz
homomorphism from algebraic K-theory to linear group homology.
Addendum: this paper has been published in J. reine angew. Math. (Crelle) 461
Addendum: this paper has been published in J. reine angew. Math. (Crelle) 461 (1995), 63-79.