Ce papier systimatise l'etude de l'existence d'un sentier de croissance optimale durable dans une economie dont les activites productives sont responsables d'emissions polluantes qui s'accumulent dans la nature et degradent le bien-etre des individus. Nous cherchons donc a identifier les...

L'objectif de cet article est de reconsiderer la theorie des irréversibilités decisionnelles dans un cadre non-Bayesien. Nous proposons tout d'abord une typologie de trois effets permettant de distinguer les roles respectifs des irreversibilites et de l'information et de pallier ainsi a une...

The attitude of future generations towards environmental assets could be different from ours, and it is necessary to take into account explicitly this possibility in the current debate about environmental policy. The question we address here is : should uncertainty about future preferences lead...

This paper develops a two-sector overlapping generations model in which one sector produces an externality on the environmental quality and the other has no effect. We assume that environmental quality degradation results from production activity of one sector. Then, we characterize the...

We consider a financial market consisting of a nonrisky asset and a risky one. We study the minimal initial capital needed in order to super-replicate a given contingent claim under the Gamma constraint, i.e. a constraint on the unbounded variation part of the hedging porfolio. In the general...

In a first time we draw a rough shape of a general formal framework for polynomial approximation theory which encompasses the existing one by allowing the expression of new types of results. We show how this framework incorporates all the existing approximation results and, moreover, how new...

We establish necessary conditions of optimality for problems of optimal control Theory in the discrete time framework with infinite horizon. Our necessary conditions are in the form of Pontryagin principles. We treat smooth and partially nonsmooth settings, without concavity. A strong motivation...

In this paper we develop a new version of the algortihm proposed in [17] for solving exactly some variants of (un)weighted constrained two-dimensional cutting stock problems. We introduce one-dimensional bounded knapsacks in order to obtain an improved initial lower bound for limitating...

Semi-definite programming (SDP) is of growing importance in various filed: system control, mechanics, combinatorial optimization, ... Usually, it is solved by interior point methods, which are elegant, efficicent and well-suited. However, they have limitations, particularly in large-scale or...

In this paper we propose two exact algorithms for solving both two-staged and three-staged unconstrained (un) weighted cutting problems. The two-staged problem is solved by applying a dynamic programming procedure originally developed by Gilmore and Gomory [10]. The three-staged problem is...