• Thumbnail for Vertex cover
    In graph theory, a vertex cover (sometimes node cover) of a graph is a set of vertices that includes at least one endpoint of every edge of the graph....
    22 KB (2,556 words) - 01:21, 17 June 2025
  • In graph theory, an edge cover of a graph is a set of edges such that every vertex of the graph is an endpoint of at least one edge of the set. In computer...
    4 KB (628 words) - 15:37, 15 June 2025
  • Thumbnail for Vertex cover in hypergraphs
    graph theory, a vertex cover in a hypergraph is a set of vertices, such that every hyperedge of the hypergraph contains at least one vertex of that set....
    11 KB (1,328 words) - 11:01, 15 July 2025
  • Thumbnail for Independent set (graph theory)
    vertex cover. Therefore, the sum of the size of the largest independent set α ( G ) {\displaystyle \alpha (G)} and the size of a minimum vertex cover...
    30 KB (3,564 words) - 07:50, 15 July 2025
  • Thumbnail for Set cover problem
    Cover. Vertex cover is a special case of Hitting Set. Edge cover is a special case of Set Cover. Geometric set cover is a special case of Set Cover when...
    21 KB (3,011 words) - 15:31, 10 June 2025
  • Thumbnail for Kőnig's theorem (graph theory)
    an equivalence between the maximum matching problem and the minimum vertex cover problem in bipartite graphs. It was discovered independently, also in...
    24 KB (3,433 words) - 02:46, 12 December 2024
  • cover. Hence, these vertices “cover” all the edges. We wish to find a vertex cover that has the smallest possible number of vertices. Vertex covers can...
    25 KB (3,576 words) - 21:17, 19 June 2025
  • In mathematics, a vertex cycle cover (commonly called simply cycle cover) of a graph G is a set of cycles which are subgraphs of G and contain all vertices...
    4 KB (411 words) - 01:09, 9 February 2025
  • common vertices. In other words, a subset of the edges is a matching if each vertex appears in at most one edge of that matching. Finding a matching in a bipartite...
    24 KB (3,032 words) - 23:25, 29 June 2025
  • Thumbnail for Maximal independent set
    belonging to the independent set, forms a minimal vertex cover. That is, the complement is a vertex cover, a set of vertices that includes at least one endpoint...
    40 KB (5,451 words) - 01:27, 25 June 2025
  • Thumbnail for Odd cycle transversal
    perfect matching) has a vertex cover of size n + k {\displaystyle n+k} . The odd cycle transversal can be transformed into a vertex cover by including both...
    6 KB (663 words) - 17:39, 26 March 2025
  • isolated vertex, remove it. An isolated vertex cannot cover any edges, so in this case v {\displaystyle v} cannot be part of any minimal cover. If more...
    20 KB (2,852 words) - 09:44, 2 June 2024
  • Thumbnail for Vertex (graph theory)
    In discrete mathematics, and more specifically in graph theory, a vertex (plural vertices) or node is the fundamental unit of which graphs are formed:...
    6 KB (806 words) - 05:45, 12 April 2025
  • Thumbnail for Feedback vertex set
    feedback vertex set (FVS) of a graph is a set of vertices whose removal leaves a graph without cycles ("removal" means deleting the vertex and all edges...
    16 KB (1,805 words) - 23:02, 27 March 2025
  • labeled 1. cover A vertex cover is a set of vertices incident to every edge in a graph. An edge cover is a set of edges incident to every vertex in a graph...
    109 KB (16,011 words) - 12:09, 30 June 2025
  • such previously known solutions for special cases of satisfiability, vertex cover, and other graph problems. They have received notable coverage due to...
    14 KB (2,198 words) - 23:04, 24 May 2025
  • Thumbnail for River crossing puzzle
    vertices in V ′ {\displaystyle V'} , ie. that V ′ {\displaystyle V'} is a vertex cover of G {\displaystyle G} . Therefore, the size of the boat must be at least...
    8 KB (1,239 words) - 23:32, 6 April 2025
  • Thumbnail for Matching in hypergraphs
    cover). It is a generalization of the notion of a vertex cover in a graph. The vertex-cover number of a hypergraph H is the smallest size of a vertex...
    20 KB (2,606 words) - 01:16, 19 February 2025
  • Thumbnail for Well-covered graph
    graph theory, a well-covered graph is an undirected graph in which the minimal vertex covers all have the same size. Here, a vertex cover is a set of vertices...
    28 KB (3,372 words) - 07:42, 18 July 2024
  • this subset. Therefore, the solution describes a vertex cover. Additionally given some vertex cover C, y v {\displaystyle y_{v}} can be set to 1 for any...
    30 KB (4,226 words) - 01:54, 24 June 2025
  • edges incident to either vertex from the graph. As any vertex cover of the input graph must use a distinct vertex to cover each edge that was considered...
    23 KB (3,126 words) - 12:31, 25 April 2025
  • O(2^{k}m)} . A vertex cover of size k in a graph of order n can be found in time O ( 2 k n ) {\displaystyle O(2^{k}n)} , so the vertex cover problem is also...
    18 KB (2,684 words) - 10:02, 24 June 2025
  • Thumbnail for NP-completeness
    version) Subgraph isomorphism problem Subset sum problem Clique problem Vertex cover problem Independent set problem Dominating set problem Graph coloring...
    30 KB (3,618 words) - 08:25, 21 May 2025
  • ISSN 0030-364X. Kőnig's theorem (graph theory) Konig's theorem Vertex cover minimum vertex cover Matching (graph theory) matching Bruff, Derek, The Assignment...
    41 KB (5,598 words) - 15:38, 23 May 2025
  • Thumbnail for Graph theory
    neighborhoods. Vertex cover problem is the special case of set cover problem where sets to cover are every edges. The original set cover problem, also...
    50 KB (6,237 words) - 21:13, 9 May 2025
  • Thumbnail for Feedback arc set
    hardness of approximation that is known for vertex cover, and the proof uses the Karp–Lawler reduction from vertex cover to feedback arc set, which preserves...
    54 KB (6,116 words) - 02:17, 25 June 2025
  • there is no (obvious) relationship between covering graph and vertex cover or edge cover. The combinatorial formulation of covering graphs is immediately...
    10 KB (1,409 words) - 05:54, 12 April 2025
  • Thumbnail for Path cover
    G = (V, E), a path cover is a set of directed paths such that every vertex v ∈ V belongs to at least one path. Note that a path cover may include paths...
    4 KB (446 words) - 22:01, 19 June 2025
  • are the set cover problem, which is equivalent to the hitting set problem, and its special cases, the vertex cover problem and the edge cover problem. Covering...
    8 KB (938 words) - 10:54, 30 June 2025
  • Thumbnail for Perfect graph
    clique covers. The maximum independent set is complementary to a minimum vertex cover, a set of vertices that touches all edges. A minimum clique cover consists...
    59 KB (7,055 words) - 07:30, 25 February 2025