COMPLETE RIEMANNIAN MANIFOLDS 5
eluding M. Gromov, D. Quillen and S. Weinberger. Finally, I am grateful to the
Mathematical Prizes Fund of Oxford University for sabbatical support.
The main results of this paper were announced in .
A note on terminology: In  and in other places, the theory described
in this paper as 'coarse' cohomology was referred to as 'exotic' cohomology; the
present more descriptive title was suggested by Mel Rothenberg.