Pacific Journal of Mathematics

Volume 179, Number 1, May 1997

Contents

Laura De Carli
Unique continuation for a class of higher order elliptic operators ..... 1

Neil Chriss
A Geometric Construction of the Iwahori-Hecke Algebra for Unramified Groups ..... 11

Joseph A. Cima and Alec L. Matheson
Essential norms of composition operators and Aleksandrov measures ..... 59

G.P. Galdi, A. Novotny and M. Padula
On the Twodimensional Steady-State Problem of a Viscous Gas in an Exterior Domain ..... 65

Daniel J. Heath and Tsuyoshi Kobayashi
Essential Tangle Decomposition from Thin Position of a Link ..... 101

Winfried Kohnen
On the average growth of Fourier coefficients of Siegel cusp forms of genus 2 ..... 119

Shrawan Kumar and Gail Letzter
Shapovalov Determinant for Restricted and Quantized Restricted Enveloping Algebras ..... 123

Werner Georg Nowak
Primitive lattice points in starlike planar sets ..... 163

Anand Pillay
Some foundational questions concerning differential algebraic groups ..... 179

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