Volume 149, Issue 1 – January 1999

Rigidity of infinite disk patterns

Pages 1-2 by Zheng-Xu He

Hard ball systems are completely hyperbolic

Pages 35-96 by Nándor Simányi, Domokos Szász

Blowup of small data solutions for a quasilinear wave equation in two space dimensions

Pages 97-127 by Serge Alinhac

Quantum cohomology of flag manifolds $G/B$ and quantum Toda lattices

Pages 129-148 by Bumsig Kim

Homogeneity of infinite dimensional isoparametric submanifolds

Pages 149-181 by Ernst Heintze, Xiaobo Liu

The instability of naked singularities in the gravitational collapse of a scalar field

Pages 183-217 by Demetrios Christodoulou

On finite homomorphic images of the multiplicative group of a division algebra

Pages 219-251 by Yoav Segev

Basepoint freeness for nef and big line bundles in positive characteristic

Pages 253-286 by Seán Keel

Continuous families of isospectral metrics on simply connected manifolds

Pages 287-308 by Dorothee Schueth

A counterexample to the “hot spots” conjecture

Pages 309-317 by Krzysztof Burdy, Wendelin Werner