Volume 108, Issue 1 – July 1978

## Closed geodesics and the $\eta$-invariant

Pages 1-39 by John J. Millson

## The structure of countable Boolean algebras

Pages 41-89 by Jussi Ketonen

## Ends of knot groups

Pages 41-89 by Francisco Javier González-Acuña, José María Montesinos

## The dichotomy problem for homogeneous Banach algebras

Pages 97-105 by Misha Zafran

## On the Stickelberger ideal and the circular units of a cyclotomic field

Pages 107-134 by Warren Sinnott