We study the number \({\cal{P}}(G)\) of non-equivalent ways of coloring a given graph \(G\). We show some similarities and differences between this graph...

Many important NP-hard combinatorial problems can be efficiently approximated using semidefinite programming relaxations. We propose a new hierarchy of sem...

This article deals with the general theory of games played over uncontrolled event trees, i.e., games where the transition from one node to another is natu...

It is increasingly important to provide the relevant data for strategic decisions related to oil production and the marketing of oil products. We propose the...

<b>Background:</b> Zoonoses are a growing international threat interacting at the human-animal-environment interface and call for transdisciplinary and mul...

In terms of energy resources, Canada is an important player on the world scene. However, the energy systems of the Canadian provinces and territories are muc...

We study the Capacity Constrained Lot Size Problem with Setup Times (CLST). Based on two strong reformulations of the problem, we present a transformed refor...

In this article we introduce the Quadratic Capacitated Vehicle Routing Problem (QCVRP), a combinatorial optimization problem that arises in practical applica...

The Euclidean distance between the eigenvalue sequences of graphs \(G\) and \(H\), on the same number of vertices, is called the spectral distance &nb...

L'écriture est une activité humaine complexe qui implique l'utilisation par le scripteur d'outils aujourd'hui variés (papier-crayon, papier-clavier, écran-cl...

La recherche à voisinages variables (RVV), ou <i>Variable Neighborhood Search (VNS)</i> en anglais est une métaheuristique dont l'invention est due à Nenad ...

This paper proposes a state-of-the-art branch-cut-and-price algorithm for the vehicle routing problem with stochastic demands (VRPSD). We adapt the model of ...

The PROMETHEE method, developed by Brans and Mareschal (Brans, 1982; Brans and Mareschal, 1994) has been extended to be used in the group decision context (a...

Subsurface flow and solute transport simulations are performed using different scenarios of permeability fields generated from the sequential Gaussian simula...

Mine scheduling requires input variables such as geological model and economic values in order to deliver an optimal production schedule. Geological uncertai...

The classical maximum closure problem is of particular importance to the mining industry because it is the underlying formulation related to mine design and ...

This paper attempts to incorporate equipment selection/allocation into the optimization of open pit mine production scheduling. Equipment selection has been ...

The characterization of the spatial continuity of categorical variables, such as geological units, is a longstanding subject in geostatistics. Indicator cova...

This paper proposes a stochastic integer programming (SIP) formulation to address the optimization of long-term mine production schedules, whereby the supply...

The spatial continuity of lithology and ore grade is one of the key factor for proper mine planning. Traditional geostatistical methods are used for spatial ...