RaretéLa rareté (du latin : raritas) exprime la difficulté de trouver une chose particulière, du fait qu'elle se manifeste d'une manière peu fréquente ou qu'elle existe en faibles quantités ou sous forme d'exemplaires en nombre limité. La notion abstraite de "rareté" , traduite sur un plan concret, donne lieu à qualification toujours relative : le qualificatif doit s'appliquer à un élément spécifique : une maladie rare, des plantes rares... l'objet qualifié doit correspondre à un besoin et donc faire l'objet d'une demande ou d'un désir.
Business analysisBusiness analysis is a professional discipline focused on identifying business needs and determining solutions to business problems. Solutions may include a software-systems development component, process improvements, or organizational changes, and may involve extensive analysis, strategic planning and policy development. A person dedicated to carrying out these tasks within an organization is called a business analyst or BA. Business analysts are not found solely within projects for developing software systems.
Sustainable engineeringSustainable engineering is the process of designing or operating systems such that they use energy and resources sustainably, in other words, at a rate that does not compromise the natural environment, or the ability of future generations to meet their own needs.
Workforce productivityWorkforce productivity is the amount of goods and services that a group of workers produce in a given amount of time. It is one of several types of productivity that economists measure. Workforce productivity, often referred to as labor productivity, is a measure for an organisation or company, a process, an industry, or a country.
Artificial scarcityArtificial scarcity is scarcity of items despite the technology for production or the sufficient capacity for sharing. The most common causes are monopoly pricing structures, such as those enabled by laws that restrict competition or by high fixed costs in a particular marketplace. The inefficiency associated with artificial scarcity is formally known as a deadweight loss. In a capitalist system, an enterprise is judged to be successful and efficient if it is profitable.
Rationnel de GaussEn mathématiques, un est un nombre complexe dont les parties réelle et imaginaire sont des nombres rationnels. L'ensemble des rationnels de Gauss est donc C'est un sous-corps de C, généralement noté Q(i) ou Q[i]. Ces nombres tirent leur nom du mathématicien allemand Carl Friedrich Gauss. Q(i) est le corps de rupture du polynôme X + 1. C'est donc un corps quadratique imaginaire et un corps cyclotomique. L'anneau des entiers de Q(i) est l'anneau Z[i] des entiers de Gauss. Son discriminant est –4.
Rational mappingIn mathematics, in particular the subfield of algebraic geometry, a rational map or rational mapping is a kind of partial function between algebraic varieties. This article uses the convention that varieties are irreducible. Formally, a rational map between two varieties is an equivalence class of pairs in which is a morphism of varieties from a non-empty open set to , and two such pairs and are considered equivalent if and coincide on the intersection (this is, in particular, vacuously true if the intersection is empty, but since is assumed irreducible, this is impossible).
