Published by Duke University Press since its inception in 1935, the Duke Mathematical Journal is one of the world's leading mathematical journals. Without specializing in a small number of subject areas, it emphasizes the most active and influential areas of current mathematics.

### Volume 44, Number 3

#### Publication Date: September 1977

Lectures on spectral theory of elliptic operators

Victor Guillemin; 485-517

Explicit determination of area minimizing hypersurfaces

Harold Parks; 519-534

$\mathrm{p}$-adic hypergeometric functions and their cohomology

S. Sperber; 535-589

Calculs de dimensions de Hausdorff

Jacques Peyrière; 591-601

Schur multipliers

G. Bennett; 603-639

Pseudoconvex domains: existence of Stein neighborhoods

Klas Diederich and John Erik Fornaess; 641-662

Normal maps, covering spaces, and quadratic functions

G. W. Brumfiel and R. J. Milgram; 663-694

Estimates for the Bergman and Szegö projections on strongly pseudo-convex domains

D. H. Phong and E. M. Stein; 695-704

Restrictions of Fourier transforms to quadratic surfaces and decay of solutions of wave equations

Robert S. Strichartz; 705-714