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 85, Number 3

#### Publication Date: December 1996

Abelian \mathrm{C}^\ast-subalgebras of \mathrm{C}^\ast-algebras of real rank zero and inductive limit \mathrm{C}^\ast-algebras

George A. Elliott, Guihua Gong, Huaxin Lin and Cornel Pasnicu; 511-554

Hasse principle for Witt groups of function fields with special reference to elliptic curves

R. Parimala and R. Sujatha; 555-582

Constant mean curvature surfaces with planar boundary

Rafael López and Sebastián Montiel; 583-604

On degenerate secant and tangential varieties and local differential geometry

J. M. Landsberg; 605-634

A solution to quantum Knizhnik-Zamolodchikov equations and its application to eigenvalue problems of the Macdonald type

Katsuhisa Mimachi; 635-658

On the Hitchin system

Bert van Geemen and Emma Previato; 659-683

On extendability of isometric immersions of spheres

John Douglas Moore; 685-699

Symplectic couples on $4$-manifolds

Hansjörg Geiges; 701-711

Erratum: “Translates of functions of two variables,” vol. 58 (1989) pp. 251–297

Håkan Hedenmalm; 713-714