### Volume 8, 1995

## Third Workshop on Partial Differential Equations

Rio de Janeiro, July 1993 - Instituto de Matemática Pura e Aplicada (IMPA)

edited by Rafael Iorio Jr., Dan Marchesin

## Contents

J. L. Boldrini, M. R.-Medar,
On a System of Evolution
Equations of Magnetohydrodynamic Type

J. L. Bona, M. Scialom,
On the Comparison of Solutions of
Model Equations for Long Waves

B. Boston, J. W. Grove, R. L. Homes,
Shock Induced
Surface Instabilities and
Nonlinear Wave Interactions

S. Cani&cacute,
The Role of Limit Cycles in the Admissibility of Shock
Waves

T. Cazenave, A. Haraux, F. B. Weissler
Global Behavior
for some Conservative Nonlinear Equations

G.-Q. Chen,
Some Singular Limit Problems in Conservation Laws

J. C. Da-Mota, W. B. Dantas, M. E. Gomes, D. Marchesin,
Combustion Fronts in Petroleum Reservoirs

C. S. Eschenazi,
Rarefaction Fields in Systems of Three
Conservation Laws

H. Frid,
Measure-Valued Solutions for Multiphase Flow in
Porous Media: Existence and Weak Asymptotic Steadiness of Waterflooding

J. M. Hurley, B. J. Plohr,
Some Effects of Viscous Terms
on Riemann Problem Solutions

M. C. Lopes-Filho, H. J. N. Lopes,
Multidimensional Hyperbolic
Systems with Degenerate Characteristic Structure

S. M. C. Malta, A. F. D. Loula, E. L.M. Garcia,
A Post-Processing Technique to Approximate the
Velocity
Field in Miscible Displacement Simulations

D. Marchesin, A. J. Souza,
Fundamental Solutions of a System
of Conservation Laws with a Singular Characteristic Field

L. A. Medeiros, A. R. Santos,
Remarks on the Degenerate Visco-
Elastic Model of Kirchhoff-Carrier for Vibrations of Strings

M. A. Rojas-Medar, S. A. Lorca,
Global Strong Solution of the
Equations for the Motion of a Chemical Active Fluid

P. R. Zingano,
Travelling Waves in a Hyperbolic System Modelling
Traffic Flow