enumerative technique
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Double counting (proof technique) — In combinatorics, double counting, also called counting in two ways, is a combinatorial proof technique for showing that two expressions are equal by demonstrating that they are two ways of counting the size of one set. In this technique, which… … Wikipedia
Combinatorics — is a branch of mathematics concerning the study of finite or countable discrete structures. Aspects of combinatorics include counting the structures of a given kind and size (enumerative combinatorics), deciding when certain criteria can be met,… … Wikipedia
HILBERT (PROBLÈMES DE) — «Qui ne se réjouirait de pouvoir soulever le voile qui cache le futur, de jeter un regard sur le développement des mathématiques, ses progrès ultérieurs, les secrets des découvertes des siècles à venir?...» Prévoir le futur des mathématiques: qui … Encyclopédie Universelle
library — /luy brer ee, breuh ree, bree/, n., pl. libraries. 1. a place set apart to contain books, periodicals, and other material for reading, viewing, listening, study, or reference, as a room, set of rooms, or building where books may be read or… … Universalium
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
Combinatorial proof — In mathematics, the term combinatorial proof is often used to mean either of two types of proof of an identity in enumerative combinatorics that either states that two sets of combinatorial configurations, depending on one or more parameters,… … Wikipedia
Trigonometric functions — Cosine redirects here. For the similarity measure, see Cosine similarity. Trigonometry History Usage Functions Generalized Inverse functions … Wikipedia
Gromov–Witten invariant — In mathematics, specifically in symplectic topology and algebraic geometry, Gromov–Witten (GW) invariants are rational numbers that, in certain situations, count pseudoholomorphic curves meeting prescribed conditions in a given symplectic… … Wikipedia
CULTURE (SOCIOLOGIE DE LA) — C’est une illusion de croire qu’une sociologie de la culture pourrait se constituer sans qu’immédiatement la mémoire informée ne soit encombrée par l’histoire polysémique des diverses définitions que le mot culture évoque dès qu’il apparaît soit… … Encyclopédie Universelle
MINORITÉS — Le problème des minorités est fort ancien, car il s’est posé dès le moment où ont existé des communautés politiques organisées. Dans le monde occidental, les phénomènes d’oppression des minorités ont coïncidé avec la naissance des États modernes… … Encyclopédie Universelle
PET — Contents 1 People 2 Medicine 3 Science 4 Technology … Wikipedia
