The variable neighborhood search metaheuristic is applied to the primal simple plant location problem and to a reduced dual obtained by exploiting the compl...

Most examples of cycling in the simplex method are given without explanation of how they were constructed. An exception is Beale’s 1955 example built around...

An infinite-horizon differential game between a manufacturer and a retailer is con- sidered. The players control their marketing efforts and the sales share...

In this paper, a solution approach based on the column generation technique is pre- sented for solving a time-indexed formulation of the total weighted tard...

Estimation of the Pareto tail index from extreme order statistics is an important problem in many settings such as income distributions (for inequality meas...

We consider vehicle routing and crew scheduling problems that involve a lexico- graphic bi-level objective function (for instance, minimizing first the numb...

It is well known that each tree metric <i>M</i> has a unique realization as a tree, and that this realization minimizes the total length of the edges among ...

The Holt-Klee Condition states that there exist at least <i>d</i> vertex-disjoint strictly monotone paths from the source to the sink of a polytopal digraph ...

This paper examines the plant location problem under the objective of maximizing return-on-investment. However, in place of the standard assumption that all...

Column generation is one of the most successful approaches for solving large scale linear programming problems. However, degeneracy difficulties and long-ta...

Column generation has become a powerful tool in solving large scale integer programs. It is well known that most of the often reported compatibility issues ...

Deheuvels (1981a,b,c) and Genest and Rémillard (2004) have shown that powerful rank tests of multivariate independence can be based on combinations of asymp...

The multivariate modelling of default risk is a crucial aspect of the pricing of credit derivative products referencing a portfolio of underlying assets, an...

Deheuvels proposed a rank test of independence based on a Cramér–von Mises functional of the empirical copula process. Using a general result on the asympto...

Rank-based estimators were proposed by Clayton (1978) and Oakes (1982) for the association parameter in the bivariate gamma frailty model. The joint asympto...

Several upper bounds on the largest Laplacian eigenvalue of a graph <i>G</i>, in terms of degree and average degree of neighbors of its vertices, have been ...

The AutoGraphiX (AGX) system for computer assisted or, for some of its functions, fully automated graph theory was developed at GERAD, Montreal since 1997. ...

This is the last part of a four-part survey of optimization models and solution algorithms for winter road maintenance planning. The two first parts of the ...

Winter road maintenance planning involves a variety of decision-making problems related to the routing of vehicles for spreading chemicals and abrasives, fo...

This paper considers a shift scheduling problem that includes different forms of flexibility in terms of shift starting times, break lengths and break plac...