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universal graph

См. также в других словарях:

  • Universal graph — In mathematics, a universal graph is an infinite graph that contains every finite (or at most countable) graph as an induced subgraph. A universal graph of this type was first constructed by R. Rado [cite journal author = Rado, R. title =… …   Wikipedia

  • Universal Networking Language — (UNL) is a declarative formal language specifically designed to represent semantic data extracted from natural language texts. It can be used as a pivot language in interlingual machine translation systems or as a knowledge representation… …   Wikipedia

  • Glossary of graph theory — Graph theory is a growing area in mathematical research, and has a large specialized vocabulary. Some authors use the same word with different meanings. Some authors use different words to mean the same thing. This page attempts to keep up with… …   Wikipedia

  • Graph of groups — In geometric group theory, a graph of groups is an object consisting of a collection of groups indexed by the vertices and edges of a graph, together with a family of injective homomorphisms of the edge groups into the vertex groups.There is a… …   Wikipedia

  • Rado graph — The Rado graph, as numbered by Rado (1964). In the mathematical field of graph theory, the Rado graph, also known as the random graph or the Erdős–Renyi graph, is the unique (up to isomorphism) countable graph R such that for any finite graph G… …   Wikipedia

  • Covering graph — In the mathematical discipline of graph theory, a graph C is a covering graph of another graph G if there is a covering map from the vertex set of C to the vertex set of G. A covering map f is a surjection and a local isomorphism: the… …   Wikipedia

  • Coordinated Universal Time — UTC redirects here. For other uses, see UTC (disambiguation). Coordinated Universal Time (abbreviated UTC) is the primary time standard by which the world regulates clocks and time. It is one of several closely related successors to Greenwich… …   Wikipedia

  • Quantum graph — In mathematics and physics, a quantum graph is a linear, network shaped structure whose time evolution is described by a system of schrödinger equations or, more generally, by a set of evolution equations associated with differential or pseudo… …   Wikipedia

  • Conceptual graph — Conceptual graphs (CGs) are a formalism for knowledge representation. In the first published paper on CGs, John F. Sowa (Sowa 1976) used them to represent the conceptual schemas used in database systems. The first book on CGs (Sowa 1984) applied… …   Wikipedia

  • Primal constraint graph — In constraint satisfaction, the primal constraint graph or simply primal graph (also the Gaifman graph) of a constraint satisfaction problem is the graph whose nodes are the variables of the problem and an edge joins a pair of variables if the… …   Wikipedia

  • Grafo universal — En teoría de grafos, un grafo universal es un grafo infinito que contiene a todos los grafos finitos (o al menos numerables) como un subgrafo inducido. El primer grafo universal fue construido por R. Rado,[1] [2] actualmente llamado grafo de Rado …   Wikipedia Español

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