- discrete category
- мат. дискретная категория
Большой англо-русский и русско-английский словарь. 2001.
discrete category
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Discrete category — In mathematics, especially category theory, a discrete category is a category whose only morphisms are the identity morphisms. It is the simplest kind of category. Specifically a category C is discrete if homC(X, X) = {idX} for all objects X… … Wikipedia
Category (mathematics) — In mathematics, a category is an algebraic structure that comprises objects that are linked by arrows . A category has two basic properties: the ability to compose the arrows associatively and the existence of an identity arrow for each object. A … Wikipedia
Category management — is a retailing concept in which the total range of products sold by a retailer is broken down into discrete groups of similar or related products; these groups are known as product categories. Examples of grocery categories may be : tinned fish,… … Wikipedia
Category utility — is a measure of category goodness defined in Harvtxt|Gluck|Corter|1985 and Harvtxt|Corter|Gluck|1992. It was intended to supersede more limited measures of category goodness such as cue validity (Harvnb|Reed|1972;Harvnb|Rosch|Mervis|1975) and… … Wikipedia
Discrete transistor — Discrete transistors are transistors that are individually packaged.The two main categories of packaging are through hole (or leaded ), and surface mount , also known as surface mount device (SMD).Transistor packages are made of glass, metal,… … Wikipedia
Discrete space — In topology, a discrete space is a particularly simple example of a topological space or similar structure, one in which the points are isolated from each other in a certain sense. Contents 1 Definitions 2 Properties 3 Uses … Wikipedia
Discrete group — Concepts in group theory category of groups subgroups, normal subgroups group homomorphisms, kernel, image, quotient direct product, direct sum semidirect product, wreath product … Wikipedia
Discrete mathematics — For the mathematics journal, see Discrete Mathematics (journal). Graphs like this are among the objects studied by discrete mathematics, for their interesting mathematical properties, their usefulness as models of real world problems, and their… … Wikipedia
Category of topological spaces — In mathematics, the category of topological spaces, often denoted Top, is the category whose objects are topological spaces and whose morphisms are continuous maps. This is a category because the composition of two continuous maps is again… … Wikipedia
Discrete geometry — A collection of circles and the corresponding unit disk graph Combinatorial geometry redirects here. The term combinatorial geometry is also used in the theory of matroids to refer to a simple matroid, especially in older texts. Discrete geometry … Wikipedia
Discrete valuation ring — In abstract algebra, a discrete valuation ring (DVR) is a principal ideal domain (PID) with exactly one non zero maximal ideal. This means a DVR is an integral domain R which satisfies any one of the following equivalent conditions: R is a local… … Wikipedia
