Vol. 63, No. 2, 2006 · Contents

Ana Paula S. Dias and Rui C. Paiva:
Hopf bifurcation with ${\bf S}_3$-symmetry

Miguel Ramos and Sérgio H.M. Soares:
On the concentration of solutions of singularly perturbed Hamiltonian systems in $\mathbb{R}^N$

Claude Sabbah:
Hypergeometric periods for a tame polynomial

Fabio A.C.C. Chalub and José Francisco Rodrigues:
A class of kinetic models for chemotaxis with threshold to prevent overcrowding