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In graph theory, a tree is an undirected graph in which any two vertices are connected by exactly one path, or equivalently a connected acyclic undirected graph. [1] A forest is an undirected graph in which any two vertices are connected by at most one path, or equivalently an acyclic undirected graph, or equivalently a disjoint union of trees. [2]
There is no single commonly accepted definition of a knowledge graph. Most definitions view the topic through a Semantic Web lens and include these features: [13] Flexible relations among knowledge in topical domains: A knowledge graph (i) defines abstract classes and relations of entities in a schema, (ii) mainly describes real world entities and their interrelations, organized in a graph ...
In mathematics, topological graph theory is a branch of graph theory. It studies the embedding of graphs in surfaces, spatial embeddings of graphs, and graphs as topological spaces. [1] It also studies immersions of graphs. Embedding a graph in a surface means that we want to draw the graph on a surface, a sphere for example, without two edges ...
Various collaborative online encyclopedias were attempted before the start of Wikipedia, but with limited success. [19] Wikipedia began as a complementary project for Nupedia, a free online English-language encyclopedia project whose articles were written by experts and reviewed under a formal process. [20]
Despicable Me 4 is a 2024 American animated comedy film produced by Universal Pictures and Illumination, and distributed by Universal. It is the sequel to Despicable Me 3 (2017), the fourth main installment, and the sixth overall installment in the Despicable Me franchise.
A piper diagram and two ternary diagrams on the composition of intrusive volcanic rocks; see QAPF diagram. A Piper diagram is a graphic procedure proposed by Arthur M. Piper in 1944 for presenting water chemistry data to help in understanding the sources of the dissolved constituent salts in water. This procedure is based on the premise that ...
ISO 3166-1 (Codes for the representation of names of countries and their subdivisions – Part 1: Country codes) is a standard defining codes for the names of countries, dependent territories, and special areas of geographical interest.
Gymnastics competitions at the 2024 Summer Olympics in Paris were contested in three categories: artistic gymnastics, rhythmic gymnastics and trampolining.The artistic (27 July to 5 August) and trampoline (2 August) events occurred at the Accor Arena (referred to as the Bercy Arena due to IOC sponsorship rules), with the rhythmic events staged at Porte de La Chapelle Arena from 8 to 10 August.