Dominique de Werra

Dominique de Werra was born in Switzerland in 1942. He graduated in physical engineering at EPFL in 1965, and in 1969, a doctorate in technical sciences.

From 1969 to 1971 he was professor at Waterloo University (Canada) in the Management Sciences department. He has been a visiting professor in various European and American High Schools. In 1971 he became professor of Operations Research in Mathematics at EPFL. In 1990, he was appointed Vice President of EPFL and in addition, he became Director of training in autumn 1993.

His research focuses on discrete mathematics (combinatorial optimization, graph theory, algorithms, etc.) and their applications to industrial and informatics technology.

He has participated and directed several interdisciplinary projects in production, distribution, energy and scheduling. His work leads in particular to the time management problem and specifically to calendar management for important projects (sports, education, etc.).

In 1987-1988, he chaired the EURO association which encompasses the Operational Research in Europe. He is Dr. h.c. of Paris University and Ecole Polytechnique in Poznan, and he was the winner of the European gold medal (EURO) of Operational Research in 1995. In March 2000 he was appointed Dean of International Affairs.

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Graph coloring

In graph theory, graph coloring is a special case of graph labeling; it is an assignment of labels traditionally called "colors" to elements of a graph subject to certain constraints. In its simplest form, it is a way of coloring the vertices of a graph such that no two adjacent vertices are of the same color; this is called a vertex coloring. Similarly, an edge coloring assigns a color to each edge so that no two adjacent edges are of the same color, and a face coloring of a planar graph assigns a color to each face or region so that no two faces that share a boundary have the same color.

Graph theory

In mathematics, graph theory is the study of graphs, which are mathematical structures used to model pairwise relations between objects. A graph in this context is made up of vertices (also called nodes or points) which are connected by edges (also called links or lines). A distinction is made between undirected graphs, where edges link two vertices symmetrically, and directed graphs, where edges link two vertices asymmetrically. Graphs are one of the principal objects of study in discrete mathematics.

Tabu search

Tabu search (TS) is a metaheuristic search method employing local search methods used for mathematical optimization. It was created by Fred W. Glover in 1986 and formalized in 1989. Local (neighborhood) searches take a potential solution to a problem and check its immediate neighbors (that is, solutions that are similar except for very few minor details) in the hope of finding an improved solution. Local search methods have a tendency to become stuck in suboptimal regions or on plateaus where many solutions are equally fit.

A tutorial on graph models for scheduling round-robin sports tournaments

Dominique de Werra

Many sports leagues organize their competitions as round-robin tournaments. This tournament design has a rich mathematical structure that has been studied in the literature over the years. We review s

WILEY2023

The micro-world of cographs

Dominique de Werra

Cographs constitute a small point in the atlas of graph classes. However, by zooming in on this point, we discover a complex world, where many parameters jump from finiteness to infinity. In the prese

ELSEVIER2022

Recoloring subgraphs of K-2n for sports scheduling

Dominique de Werra

The exploration of one-factorizations of complete graphs is the foundation of some classical sports scheduling problems. One has to traverse the landscape of such one-factorizations by moving from one

ELSEVIER2021