vertex set
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Feedback vertex set — In the mathematical discipline of graph theory, a feedback vertex set of a graph is a set of vertices whose removal leaves a graph without cycles. In other words, each feedback vertex set contains at least one vertex of any cycle in the graph.… … Wikipedia
Feedback Vertex Set — Der Begriff Feedback Vertex Set bzw. kreiskritische Knotenmenge bezeichnet in der Komplexitätstheorie ein graphentheoretisches Entscheidungsproblem, das NP vollständig ist. Definition Es fragt, ob es zu einem ungerichteten Multigraphen G = (V,E) … Deutsch Wikipedia
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
Set packing — is a classical NP complete problem in computational complexity theory and combinatorics, and was one of Karp s 21 NP complete problems. Suppose we have a finite set S and a list of subsets of S. Then, the set packing problem asks if some k… … 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 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 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 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 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 (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
Vertex enumeration problem — In mathematics, the vertex enumeration problem for a polyhedron, a polyhedral cell complex, a hyperplane arrangement, or some other object of discrete geometry, is the problem of determination of the object s vertices given some formal… … Wikipedia
