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A vertex of an angle is the endpoint where two lines or rays come together. In geometry, a vertex (pl.: vertices or vertexes) is a point where two or more curves, lines, or edges meet or intersect. As a consequence of this definition, the point where two lines meet to form an angle and the corners of polygons and polyhedra are vertices. [1] [2] [3]
A graph with 6 vertices and 7 edges where the vertex number 6 on the far-left is a leaf vertex or a pendant vertex. In discrete mathematics, and more specifically in graph theory, a vertex (plural vertices) or node is the fundamental unit of which graphs are formed: an undirected graph consists of a set of vertices and a set of edges (unordered pairs of vertices), while a directed graph ...
A vertex may exist in a graph and not belong to an edge. Under this definition, multiple edges , in which two or more edges connect the same vertices, are not allowed. Example of an undirected multigraph with 3 vertices, 3 edges and 4 loops.
Vertex (computer graphics), a data structure that describes the position of a point; Vertex (curve), a point of a plane curve where the first derivative of curvature is zero; Vertex (graph theory), the fundamental unit of which graphs are formed; Vertex (topography), in a triangulated irregular network; Vertex of a representation, in finite ...
A one-vertex cut is called an articulation point or cut vertex. vertex set The set of vertices of a given graph G, sometimes denoted by V(G). vertices See vertex. Vizing 1. Vadim G. Vizing 2. Vizing's theorem that the chromatic index is at most one more than the maximum degree. 3.
The word angle comes from the Latin word angulus, meaning "corner". Cognate words include the Greek ἀγκύλος ( ankylοs ) meaning "crooked, curved" and the English word " ankle ". Both are connected with the Proto-Indo-European root *ank- , meaning "to bend" or "bow".
A graph with three vertices and three edges. A graph (sometimes called an undirected graph to distinguish it from a directed graph, or a simple graph to distinguish it from a multigraph) [4] [5] is a pair G = (V, E), where V is a set whose elements are called vertices (singular: vertex), and E is a set of unordered pairs {,} of vertices, whose elements are called edges (sometimes links or lines).
The word horizontal is derived from the Latin horizon, which derives from the Greek ὁρῐ́ζων, meaning 'separating' or 'marking a boundary'. [2] The word vertical is derived from the late Latin verticalis, which is from the same root as vertex, meaning 'highest point' or more literally the 'turning point' such as in a whirlpool.