- four-vertex
- мат.четырёхвершинный
English-Russian scientific dictionary. 2008.
four-vertex
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Four-vertex theorem — The Four vertex theorem states that the curvature function of a simple, closed plane curve has at least four local extrema (specifically, at least two local maxima and at least two local minima). The name of the theorem derives from the… … Wikipedia
Vertex (curve) — In the geometry of curves a vertex is a point of where the first derivative of curvature is zero. This is typically a local maximum or minimum of curvature. Other special cases may occur, for instance when the second derivative is also zero, or… … Wikipedia
Four color theorem — Example of a four colored map A four colori … Wikipedia
Vertex operator algebra — In mathematics, a vertex operator algebra (VOA) is an algebraic structure that plays an important role in conformal field theory and related areas of physics. They have proven useful in purely mathematical contexts such as monstrous moonshine and … 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 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 configuration — In polyhedral geometry a vertex configuration is a short hand notation for representing a polyhedron vertex figure as the sequence of faces around a vertex. For uniform polyhedra there is only one vertex type and therefore the vertex… … 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 (anatomy) — In arthropod and vertebrate anatomy, the vertex (or cranial vertex ) refers to the upper surface of the head.In humans, the vertex is formed by four bones of the skull: the frontal bone, the two parietal bones, and the occipital bone. These bones … Wikipedia
Vertex (album) — Infobox Album | Name = Vertex Type = Album Artist = Buck 65 Released = 1997 Recorded = 1996 Genre = Hip Hop Length = 63:21 Label = Four Ways to Rock/Metaforensics Producer = Buck 65 Reviews = [http://www.blougou.com/anticon/vertex.htm Blougou… … 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
