external vertex

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• Vertex cover — In the mathematical discipline of graph theory, a vertex cover of a graph is a set of vertices such that each edge of the graph is incident to at least one vertex of the set. The problem of finding a minimum vertex cover is a classical… …   Wikipedia

• Vertex model — A vertex model is a type of statistical mechanics model in which the Boltzmann weights are associated with a vertex in the model (representing an atom or particle). This contrasts with a nearest neighbour model, such as the Ising model, in which… …   Wikipedia

• Vertex (geometry) — For vertices in the geometry of curves, see Vertex (curve). For other uses of the word, see Vertex (disambiguation). In geometry, a vertex (plural vertices) is a special kind of point that describes the corners or intersections of geometric… …   Wikipedia

• Vertex figure — In geometry a vertex figure is, broadly speaking, the figure exposed when a corner of a polyhedron or polytope is sliced off. Definitions theme and variationsTake some vertex of a polyhedron. Mark a point somewhere along each connected edge. Draw …   Wikipedia

• Vertex cover problem — In computer science, the vertex cover problem or node cover problem is an NP complete problem and was one of Karp s 21 NP complete problems. It is often used in complexity theory to prove NP hardness of more complicated problems. Definition A… …   Wikipedia

• Vertex (graph theory) — For other uses, see Vertex (disambiguation). 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 graph theory, a vertex (plural vertices) or node is the fundamental unit out of… …   Wikipedia

• Vertex arrangement — See vertex figure for the local description of faces around a vertex of a polyhedron or tiling. In geometry, a vertex arrangement is a set of points in space described by their relative positions. They can be described by their use in… …   Wikipedia

• Vertex (company) — Infobox Company company name = Vertex company company type = Limited Company foundation = 1996 location = Prescot, Merseyside key people = Sir Peter Gershon Executive ChairmanJeff Chittenden Chief Operating OfficeGavin James Chief Financial… …   Wikipedia

• Vertex pipeline — The function of the vertex pipeline in any GPU is to take geometry data (usually supplied as vector points), work with it if needed with either fixed function processes (earlier DirectX), or a vertex shader program (later DirectX), and create all …   Wikipedia

• Vertex function — In quantum electrodynamics, the vertex function describes the coupling between a photon and an electron beyond the leading order of perturbation theory. In particular, it is the one particle irreducible correlation function involving the fermion… …   Wikipedia

• External angles — Angle An gle ([a^][ng] g l), n. [F. angle, L. angulus angle, corner; akin to uncus hook, Gr. agky los bent, crooked, angular, a gkos a bend or hollow, AS. angel hook, fish hook, G. angel, and F. anchor.] 1. The inclosed space near the point where …   The Collaborative International Dictionary of English