Volume 105, Issue 1 – January 1977

## Set theoretic foundations for constructive analysis

Pages 1-28 by Harvey Friedman

## Degenerating families of Riemann surfaces

Pages 29-44 by William Abikoff

## Local cohomological dimension in characteristic $p$

Pages 45-79 by Robin Hartshorne, Robert Speiser

## Ergodic properties of horocycle flows for surfaces of negative curvature

Pages 81-105 by Brian Marcus

## Sur la classification des idéaux primitifs dans l’algèbre enveloppante d’une algèbre de Lie semi-simple

Pages 107-120 by Michel Duflo

## First-order theory of the degrees of recursive unsolvability

Pages 121-139 by Stephen G. Simpson

## The motion of slightly compressible fluids viewed as a motion with strong constraining force

Pages 141-200 by David G. Ebin