Volume 99, Issue 2, March 1974

## Curvature functions for open 2-manifolds

Pages 203-219 by Jerry L. Kazdan, Frank W. Warner

## Differentiable actions of compact connected Lie groups. III

Pages 220-256 by Wu-Chung Hsiang, Wu-Yi Hsiang

## On the deformation of rings and algebras. IV

Pages 257-276 by Murray Gerstenhaber

## The codimension two placement problem and homology equivalent manifolds

Pages 277-348 by Sylvain E. Cappell, Julius L. Shaneson

## $K_2$ and algebraic cycles

Pages 349-379 by Spencer Bloch

## Errata to “Classification of subshifts of finite type”

Pages 380-381 by Robert F. Williams