Title: A torsion projective class for a group algebra 

Author:  Ian J. Leary 

AMS numbers:  19A31, also 16S34 and 55N15.  

Author's address:    Faculty of Mathematical Sciences, 
                     University of Southampton, 
                     Southampton, 
                     SO17 1BJ.  

Abstract:  For a certain cyclic-by-finite group, we construct an
element of order two in the algebraic $K_0$ of the rational group 
ring, whose image in $K_0$ of the complex group ring is zero.  
Non-triviality of the element is established using topological
methods.  

To appear in Bull. London Math. Soc.