Quantum frieze patterns in quantum cluster algebras of type A

We introduce a quantisation of the Coxeter-Conway frieze patterns and prove that they realise quantum cluster variables in quantum cluster algebras associated with linearly oriented Dynkin quivers of type A. As an application, we obtain the explicit polynomials arising from the lower bound phenomenon in these quantum cluster algebras.Comment: 10 page

Absolute and Relative Deprivation and the Measurement of Poverty

This paper develops the link between poverty and inequality by focussing on a class of poverty indices (some of them well-known) which aggregate normative concerns for absolute and relative deprivation. The indices are distinguished by a parameter value that captures the ethical sensitivity of poverty measurement to "exclusion" or "relative-deprivation" aversion. The indices can be readily used to predict the impact of growth on poverty. An illustration using LIS data finds that the United States show more relative deprivation than Denmark and Belgium whatever the percentiles considered, but that overall deprivation comparisons of the four countries considered will generally depend on the intensity of the ethical concern for relative deprivation. The impact of growth on poverty also depends on the presence of and on the attention granted to concerns over relative deprivation.Poverty, Relative Deprivation, Inequality, Poverty Alleviation

Absolute and Relative Deprivation and the Measurement of Poverty

This paper develops the link between poverty and inequality by focussing on a class of poverty indices (some of them well-known) which aggregate normative concerns for absolute and relative deprivation. The indices are distinguished by a parameter that captures the ethical sensitivity of poverty measurement to "exclusion" or "relative-deprivation" aversion. We also show how the indices can be readily used to predict the impact of growth on poverty. An illustration using LIS data finds that the United States show more relative deprivation than Denmark and Belgium whatever the percentiles considered, but that overall deprivation comparisons of the four countries considered will generally necessarily depend on the intensity of the ethical concern for relative deprivation. The impact of growth on poverty is also seen to depend on the presence of and on the attention granted to concerns over relative deprivation.Poverty, Relative deprivation, Inequality, Poverty alleviation

Unskilled traders, overconfidence and information acquisition

The value of an asset has two components, referred to as obvious and obscure. Unskilled traders are only aware of the obvious component and thus overestimate the precision of the information they may acquire. Unskilled traders are overcon dent when informed and the intensity at which they trade makes researching the obscure component pro table to skilled traders, and this even when research costs are such that no information acquisition takes place in a skilled-only market. Hence overcon dence in our model encourages research by all, including the skilled (rational) traders

Handling Incoming Beliefs

International audienceMost logic-based approaches to knowledge and belief change in artificial intelligence assume that when a new piece of information comes up, it should be merely added to the current beliefs or knowledge when this does not lead to inconsistency. This paper addresses situations where this assumption does not hold. The focus is on the construction of Boolean standard-logic knowledge and belief bases in this context. We propose an approach to handle incoming beliefs that can require some formulas reconstruction or a form of preemption to be performed

Absolute and Relative Deprivation and the Measurement of Poverty

This paper develops the link between poverty and inequality by focusing on a class of poverty indices (some of them well-known) which aggregate normative concerns for absolute and relative deprivation. The indices are distinguished by a parameter that captures the ethical sensitivity of poverty measurement to 'exclusion' or 'relative-deprivation' aversion. We also show how the indices can be readily used to predict the impact of growth on poverty. An illustration using LIS data finds that the United States show more relative deprivation than Denmark and Belgium whatever the percentiles considered, but that overall deprivation comparisons of the four countries considered will generally necessarily depend on the intensity of the ethical concern for relative deprivation. The impact of growth on poverty is also seen to depend on the presence of and on the attention granted to concerns over relative deprivation

Place et limites du secret médical dans le cadre d'une maladie grave transmissible pouvant porter préjudice à un tiers

8 pages Acte de colloqueMany clinical situations lead to the opportunity to care for a patient, or to discover a medical evidence may also directly affect the health of a family member (spouse, family, sexual partner). In these situations, care, medicine therefore beyond the scope of the conference singular and wondered about the place and the rights of families, especially as sometimes the doctor knows and meets physically. This question is all the more significant for the doctor when there supported early is that really improve the life of people, their quality of life. Prevention and care for others is the essence of medical practice, the doctor may be in a situation of dilemma when the secret is imposed upon him. Thus, in the field of oncology, approaches to early detection of familial cancers have a positive impact if earlier treatment can improve the survival of (breast and colon cancer, for example). It is the same metabolic diseases with a genetic component. In the context of infectious and contagious diseases, the identification of subjects at risk and screening can help prevent transmission or limit their clinical manifestations. This paper explores the issues raised by these situations

Corriger la Logique des Défauts par la Logique des Défauts

National audienceCe papier se situe dans le contexte de la fusion de sources d'information représentées à l'aide de la logique des défauts. Plus précisément, celui-ci se focalise sur la résolution du problème apparaissant quand les connaissances classiques des sources sont contradictoires, ayant pour effet de rendre triviale la théorie avec défauts résultante. Pour outre-passer ce problème, il est montré que, remplacer chaque formule appartenant aux sous-ensembles minimaux inconsistants (MUSes) de la réunion des connaissances classiques des sources par une règle de défaut super-normale correspondante, présente un comportement intéressant. De plus, il est examiné comment ces règles de défaut supplémentaires interagissent avec les règles de défaut initiales de la théorie. Chose intéressante, cette approche nous permet de manier le problème de théories avec défauts contenant des connaissances classiques contradictoires, en utilisant le cadre de la logique des défauts lui-même