The maximum stable set problem is a well-known NP-hard problem in combinatorial optimization, which can be formulated as the maximization of a quadratic square-free polynomial over the (Boolean) hypercube. We investigate a hierarchy of linear programming relaxations for this problem, based on a...

[fre] Bien que le Parlement ait perdu une part de ses prérogatives en matière de politique agricole, du fait de la Constitution de la Vème République et de la mise en place du Marché Commun agricole, les questions agricoles restent parmi les sujets qui sont le plus ardemment et le plus...

The need to achieve acceptable levels of nitrate in drinking water has led to the development of simulation models and indicators for assessing the environmental performance of agricultural practices. These indicators are necessarily based on simplifications in order to meet the practical...