Volume 99, Issue 1, January 1974

## Riemannian manifolds with geodesic flow of Anosov type

Pages 1-13 by Wilhelm Klingenberg

## Curvature functions for compact 2-manifolds

Pages 14-47 by Jerry L. Kazdan, Frank W. Warner

## Characteristic forms and geometric invariants

Pages 48-69 by Shiing-Shen Chern, James Simons

## 2-Fusion in finite groups

Pages 70-117 by David W. Goldschmidt

## $L_3$ of finite abelian groups

Pages 118-153 by Hyman Bass

## Structural stability of vector fields

Pages 154-175 by Clark Robinson

## Fourier coefficients of certain Eisenstein series

Pages 176-202 by Martin L. Karel