Issue no. 1 Table of Contents

Numerical solutions of the mass transfer problem
A regularization method for ill-posed bilevel optimization problems
An analytic center cutting plane algorithm for finding equilibrium points
Branch and cut based on the volume algorithm : Steiner trees in graphs and max-cut

Issue no. 2 Table of Contents

Editorial
Combining constraint propagation and meta-heuristics for searching a maximum weight hamiltonian chain
Résolution d'un problème combinatoire fractionnaire par la programmation linéaire mixte
Centralized versus decentralized production planning
On-line models and algorithms for max independent set
An ex-post bound on the greedy heuristic for the uncapacitated facility location problem
Problème de tournées de véhicules multipériodiques : classification et heuristique pour la planification tactique
Influence of modeling structure in probabilistic sequential decision problems
Bilan économique du stockage en réserve qualitative de vin de Champagne

Issue no. 3 Table of Contents

On semidefinite bounds for maximization of a non-convex quadratic objective over the ℓ 1 unit ball
Analyzing discrete-time bulk-service Geo/Geo b /m queue
Convex quadratic underestimation and Branch and Bound for univariate global optimization with one nonconvex constraint
A new barrier for a class of semidefinite problems

Issue no. 4 Table of Contents

Editorial
Bounds of graph parameters for global constraints
Large neighborhood improvements for solving car sequencing problems
Des explications pour reconnaître et exploiter les structures cachées d'un problème combinatoire