DISCRETE AND CONTINUOUS DYNAMICAL SYSTEMS
 Volume 4  Number 2  April 1998

CONTENTS

Yuan Lou, Wei-Ming Ni and  Yaping Wu , On the global existence of a cross-diffusion system 193

Hans G. Kaper, Bixiang Wang and Shouhong Wang , Determining nodes for the Ginzburg-Landau equations of superconductivity 205

Pierre Fabrie and Alain Miranville , Exponential attractors for nonautonomous first-order evolution equations 225

K. Malanowski and H. Maurer , Sensitivity analysis for state constrained optimal control problems 241

Denis Mercier and Serge Nicaise , Existence results for general systems of differential equations on one-dimensional networks
and prewavelets approximation 273

Boju Jiang and Jaume Llibre , Minimal sets of periods for torus maps 301

Rodica Toader , Scattering in domains with many small obstacles 321

M. Grasselli and V. Pata , Longtime behavior of a homogenized model in viscoelastodynamics 339

N. Kamran and K. Tenenblat , Periodic systems for the higher-dimensional Laplace transformation 359

Paolo Perfetti , Fixed point theorems in the Arnol'd model about instability of the action-variables in phase-space 379

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