• Thumbnail for Intersection graph
    In graph theory, an intersection graph is a graph that represents the pattern of intersections of a family of sets. Any graph can be represented as an...
    9 KB (1,144 words) - 23:24, 9 February 2024
  • Thumbnail for Intersection number (graph theory)
    In the mathematical field of graph theory, the intersection number of a graph G = ( V , E ) {\displaystyle G=(V,E)} is the smallest number of elements...
    35 KB (4,363 words) - 13:40, 25 February 2025
  • line graphs (intersection graphs of the edges of a graph), and clique graphs (intersection graphs of the maximal cliques of a graph). Every graph is an...
    109 KB (16,011 words) - 12:09, 30 June 2025
  • Thumbnail for Interval graph
    intervals intersect. It is the intersection graph of the intervals. Interval graphs are chordal graphs and perfect graphs. They can be recognized in linear...
    22 KB (2,640 words) - 01:39, 27 August 2024
  • Thumbnail for Circle graph
    In graph theory, a circle graph is the intersection graph of a chord diagram. That is, it is an undirected graph whose vertices can be associated with...
    15 KB (1,694 words) - 07:51, 18 July 2024
  • Thumbnail for Chordal graph
    perfect elimination orderings, as the graphs in which each minimal separator is a clique, and as the intersection graphs of subtrees of a tree. They are sometimes...
    19 KB (2,164 words) - 07:51, 18 July 2024
  • Thumbnail for Intersection (set theory)
    descriptions of redirect targets Intersection graph – Graph representing intersections between given sets Intersection theory – Branch of algebraic geometry...
    12 KB (1,734 words) - 23:16, 26 December 2023
  • Thumbnail for Independent set (graph theory)
    In graph theory, an independent set, stable set, coclique or anticlique is a set of vertices in a graph, no two of which are adjacent. That is, it is a...
    30 KB (3,564 words) - 07:50, 15 July 2025
  • Thumbnail for Circle packing theorem
    its intersection graph is called a coin graph; more generally, intersection graphs of interior-disjoint geometric objects are called tangency graphs or...
    30 KB (3,857 words) - 17:30, 23 June 2025
  • In graph theory, a planar graph is a graph that can be embedded in the plane, i.e., it can be drawn on the plane in such a way that its edges intersect...
    36 KB (4,589 words) - 21:30, 18 July 2025
  • Thumbnail for Graph coloring
    In graph theory, graph coloring is a methodic assignment of labels traditionally called "colors" to elements of a graph. The assignment is subject to certain...
    70 KB (8,461 words) - 16:34, 7 July 2025
  • Thumbnail for Geometric graph theory
    interval graph; the intersection graph of unit disks in the plane is a unit disk graph. The Circle packing theorem states that the intersection graphs of non-crossing...
    7 KB (934 words) - 20:16, 2 December 2024
  • Thumbnail for Clique (graph theory)
    In graph theory, a clique (/ˈkliːk/ or /ˈklɪk/) is a subset of vertices of an undirected graph such that every two distinct vertices in the clique are...
    20 KB (2,483 words) - 12:35, 24 June 2025
  • In the mathematical discipline of graph theory, the line graph of an undirected graph G is another graph L(G) that represents the adjacencies between edges...
    44 KB (5,368 words) - 10:55, 7 June 2025
  • Thumbnail for Outerplanar graph
    In graph theory, an outerplanar graph is a graph that has a planar drawing for which all vertices belong to the outer face of the drawing. Outerplanar...
    19 KB (2,089 words) - 08:10, 14 January 2025
  • Thumbnail for Forbidden graph characterization
    (1998) "Modern Graph Theory", Springer, ISBN 0-387-98488-7 p. 9 Kashiwabara, Toshinobu (1981), "Algorithms for some intersection graphs", in Saito, Nobuji;...
    16 KB (1,155 words) - 23:27, 18 July 2025
  • gives rise to the field of spectral graph theory. Dual to the observation above that every graph is an intersection graph is the fact that every partially...
    11 KB (1,209 words) - 11:19, 9 January 2024
  • Thumbnail for Graph theory
    computer science, graph theory is the study of graphs, which are mathematical structures used to model pairwise relations between objects. A graph in this context...
    50 KB (6,237 words) - 15:29, 3 August 2025
  • Thumbnail for Random graph
    theory of random graphs lies at the intersection between graph theory and probability theory. From a mathematical perspective, random graphs are used to answer...
    15 KB (2,307 words) - 11:46, 21 March 2025
  • Thumbnail for Unit disk graph
    geometric graph theory, a unit disk graph is the intersection graph of a family of unit disks in the Euclidean plane. That is, it is a graph with one vertex...
    11 KB (1,379 words) - 09:07, 8 April 2024
  • cospectral graphs are the point-collinearity graphs and the line-intersection graphs of point-line geometries. These graphs are always cospectral but are often...
    15 KB (1,844 words) - 20:28, 19 February 2025
  • Thumbnail for Extremal graph theory
    Extremal graph theory is a branch of combinatorics, itself an area of mathematics, that lies at the intersection of extremal combinatorics and graph theory...
    10 KB (1,360 words) - 19:17, 15 July 2025
  • Thumbnail for Block graph
    Block graphs may be characterized as the intersection graphs of the blocks of arbitrary undirected graphs. Block graphs are exactly the graphs for which...
    8 KB (986 words) - 08:35, 13 January 2025
  • Thumbnail for Permutation graph
    reversed by the permutation. Permutation graphs may also be defined geometrically, as the intersection graphs of line segments whose endpoints lie on two...
    8 KB (938 words) - 07:10, 16 February 2023
  • Chalopin, Jérémie; Gonçalves, Daniel (2009). "Every planar graph is the intersection graph of segments in the plane: extended abstract". In Mitzenmacher...
    196 KB (20,120 words) - 20:23, 30 July 2025
  • n\geq d+3} , so the class of graphs with bounded degeneracy has few cliques. Let G {\displaystyle G} be an intersection graph of n {\displaystyle n} convex...
    6 KB (963 words) - 04:50, 12 April 2025
  • Thumbnail for Bipartite graph
    In the mathematical field of graph theory, a bipartite graph (or bigraph) is a graph whose vertices can be divided into two disjoint and independent sets...
    33 KB (4,086 words) - 21:34, 28 May 2025
  • nonempty intersection in H. In other words, L(H) is the intersection graph of a family of finite sets. It is a generalization of the line graph of a graph. Questions...
    10 KB (1,201 words) - 17:30, 10 November 2023
  • Thumbnail for Erdős–Faber–Lovász conjecture
    Erdős–Faber–Lovász conjecture (category Graph coloring)
    most n. The graph of the Erdős–Faber–Lovász conjecture may be represented as an intersection graph of sets: to each vertex of the graph, correspond the...
    14 KB (1,617 words) - 20:45, 27 February 2025
  • Thumbnail for Clique graph
    is, the clique graph K(G) is the intersection graph of the maximal cliques of G. A graph H is the clique graph K(G) of another graph if and only if there...
    5 KB (635 words) - 18:54, 22 February 2025