Graph

English

A graph of demographic data

Etymology

Template:Root Template:Clipping. From 1878; verb from 1889.

Pronunciation

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Noun

1. Template:Lb A data chart (graphical representation of data) intended to illustrate the relationship between a set (or sets) of numbers (quantities, measurements or indicative numbers) and a reference set, whose elements are indexed to those of the former set(s) and may or may not be numbers.

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2. Template:Lb A set of points constituting a graphical representation of a real function; Template:Lb a set of tuples $(x_1,x_2,\dots ,x_m,y)\in {ℝ}^{m+1}$, where $y=f(x_1,x_2,\dots ,x_m)$ for a given function $f:{ℝ}^m\to ℝ$. See also Template:Pedia Template:C Template:C
   • 1969 [MIT Press], Thomas Walsh, Randell Magee (translators), I. M. Gelfand, E. G. Glagoleva, E. E. Shnol, Functions and Graphs, 2002, Dover, page 19,

     Let us take any point of the first graph, for example, $x=\frac{1}{2},y=\frac{4}{5}$, that is, the point $M_1(\frac{1}{2},\frac{4}{5})$.

3. Template:Lb A set of vertices (or nodes) connected together by edges; Template:Lb an ordered pair of sets $(V,E)$, where the elements of $V$ are called vertices or nodes and $E$ is a set of pairs (called edges) of elements of $V$. See also Template:Pedia

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   • 1973, Edward Minieka (translator), Template:W, Graphs and Hypergraphs, Elsevier (North-Holland), [1970, Claude Berge, Graphes et Hypergraphes], page vii,

     Problems involving graphs first appeared in the mathematical folklore as puzzles (e.g. Königsberg bridge problem). Later, graphs appeared in electrical engineering (Kirchhof's Law), chemistry, psychology and economics before becoming a unified field of study.

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4. Template:Lb A topological space which represents some graph (ordered pair of sets) and which is constructed by representing the vertices as points and the edges as copies of the real interval [0,1] (where, for any given edge, 0 and 1 are identified with the points representing the two vertices) and equipping the result with a particular topology called the graph topology.

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   • 2008, Unnamed translators (AMS), A. V. Alexeevski, S. M. Natanzon, Hurwitz Numbers for Regular Coverings of Surfaces by Seamed Surfaces and Cardy-Frobenius Algebras of Finite Groups, V. M. Buchstaber, I. M. Krichever (editors), Geometry, Topology, and Mathematical Physics: S.P. Novikov's Seminar, 2006-2007, Template:W, page 6,

     First, let us define its 1-dimensional analog, that is, a topological graph. A graph $\mathrm{\Delta }$ is a 1-dimensional stratified topological space with finitely many 0-strata (vertices) and finitely many 1-strata (edges).Template:...A graph such that any vertex belongs to at least two half-edges we call an s-graph. Clearly the boundary $\partial \mathrm{\Omega }$ of a surface $\mathrm{\Omega }$ with marked points is an s-graph.

     A morphism of graphs $\phi :{\mathrm{\Delta }}^{\prime }\to {\mathrm{\Delta }}^{″}$ is a continuous epimorphic map of graphs compatible with the stratification; i.e., the restriction of $\phi$ to any open 1-stratum (interior of an edge) of ${\mathrm{\Delta }}^{\prime }$ is a local (therefore, global) homeomorphism with appropriate open 1-stratum of ${\mathrm{\Delta }}^{″}$.

5. Template:Lb A morphism ${\mathrm{\Gamma }}_f$ from the domain of $f$ to the product of the domain and codomain of $f$, such that the first projection applied to ${\mathrm{\Gamma }}_f$ equals the identity of the domain, and the second projection applied to ${\mathrm{\Gamma }}_f$ is equal to $f$.
6. Template:Lb A graphical unit on the Template:L, the abstracted fundamental shape of a character or letter as distinct from its ductus (realization in a particular typeface or handwriting on the Template:L) and as distinct by a Template:L on the Template:L by not fundamentally distinguishing Template:L.

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Usage notes

• In mathematics, the graphical representation of a function sense is generally of interest only at an elementary level. Nevertheless, the term Template:M is sometimes used in educational texts to distinguish the graph theory sense.

Hyponyms

• See also Thesaurus:graph

Translations

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Verb

1. Template:Lb To draw a graph, to record graphically.
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2. Template:Lb To draw a graph of a function.

Synonyms

• Template:Sense Template:L, Template:L

Translations

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See also

• Graph on Template:W

Anagrams

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