The Turán graph, denoted by T ( n , r ) {\displaystyle T(n,r)} , is a complete multipartite graph; it is formed by partitioning a set of n {\displaystyle...
10 KB (1,262 words) - 13:42, 15 July 2024
Turán 1977, p. 7. P. Turán, «A note of welcome», Journal of Graph Theory 1 (1977), pp. 7-9. Turán 1977, p. 8. "Mathematical Graffiti #1 – Pál Turán e...
19 KB (2,194 words) - 23:23, 29 March 2025
n-vertex graphs. Turán's theorem, and the Turán graphs giving its extreme case, were first described and studied by Hungarian mathematician Pál Turán in 1941...
21 KB (3,502 words) - 21:22, 30 May 2025
regular graph Threshold graph Total graph Tree (graph theory). Trellis (graph) Turán graph Ultrahomogeneous graph Vertex-transitive graph Visibility graph Museum...
7 KB (663 words) - 02:52, 24 September 2024
K_{r})} and characterizes all graphs attaining this maximum; such graphs are known as Turán graphs. For non-bipartite graphs G {\displaystyle G} , the Erdős–Stone...
10 KB (1,360 words) - 10:09, 11 June 2025
Erdős–Stone theorem (category Extremal graph theory)
extremal number. Turán's theorem says that ex(n; Kr) = tr − 1(n), the number of edges of the Turán graph T(n, r − 1), and that the Turán graph is the unique...
9 KB (1,405 words) - 00:58, 6 April 2025
k-partite graphs and graphs that avoid larger cliques as subgraphs in Turán's theorem, and these two complete bipartite graphs are examples of Turán graphs, the...
12 KB (960 words) - 08:06, 6 April 2025
A graph with 0 vertices is also called null graph. Turán 1. Pál Turán 2. A Turán graph is a balanced complete multipartite graph. 3. Turán's theorem...
109 KB (16,011 words) - 18:32, 30 April 2025
The graphs meeting this bound are the Moon–Moser graphs K3,3,..., a special case of the Turán graphs arising as the extremal cases in Turán's theorem...
20 KB (2,501 words) - 18:00, 21 February 2025
generally any Turán graph is locally Turán. Every planar graph is locally outerplanar. However, not every locally outerplanar graph is planar. A graph is triangle-free...
10 KB (1,122 words) - 08:52, 18 August 2023
Ramsey-Turán theory is a subfield of extremal graph theory. It studies common generalizations of Ramsey's theorem and Turán's theorem. In brief, Ramsey-Turán...
7 KB (1,133 words) - 05:04, 12 April 2025
multipartite graph is a graph that is complete k-partite for some k. The Turán graphs are the special case of complete multipartite graphs in which each...
4 KB (399 words) - 15:28, 17 January 2025
Forces Turanism, a political movement Curse of Turan, a Hungarian superstition Turán graph, a mathematical graph Tourane, former name of Đà Nẵng, a port city...
2 KB (353 words) - 16:23, 29 August 2024
Cograph (redirect from Complement-reducible graph)
In graph theory, a cograph, or complement-reducible graph, or P4-free graph, is a graph that can be generated from the single-vertex graph K1 by complementation...
22 KB (2,689 words) - 18:27, 19 April 2025
Regular octahedron (redirect from Octahedral graph)
opposite vertices. More generally, it is a Turán graph T 6 , 3 {\displaystyle T_{6,3}} . The octahedral graph is 4-connected, meaning that it takes the...
31 KB (3,132 words) - 06:45, 14 June 2025
drawing. The study of crossing numbers originated in Turán's brick factory problem, in which Pál Turán asked for a factory plan that minimized the number...
27 KB (3,160 words) - 20:56, 12 March 2025
1-skeleton of an n-dimensional cross-polytope is the Turán graph T(2n, n) (also known as a cocktail party graph ). In 1 dimension the cross-polytope is simply...
20 KB (1,111 words) - 21:34, 14 June 2025
sets have the same size, cluster graphs are well-covered. The Turán graphs are complement graphs of cluster graphs, with all complete subgraphs of equal...
6 KB (647 words) - 06:47, 25 June 2023
Forbidden subgraph problem (redirect from Turan-type problem)
(n,H)} edges. We introduce Turán density to formalize this notion. The Turán density of a h {\displaystyle h} -uniform graph G {\displaystyle G} is defined...
24 KB (4,298 words) - 08:07, 11 January 2024
defined as graphs with clique number ≤ 2, graphs with girth ≥ 4, graphs with no induced 3-cycle, or locally independent graphs. By Turán's theorem, the...
21 KB (2,524 words) - 06:45, 12 May 2025
cliques, then X {\displaystyle X} is said to be a class of graphs with few cliques. The Turán graph T ( n , ⌈ n / 3 ⌉ ) {\displaystyle T(n,\lceil n/3\rceil...
6 KB (963 words) - 04:50, 12 April 2025
specially the results obtained by Turán in 1941 was at the origin of another branch of graph theory, extremal graph theory. The four color problem remained...
50 KB (6,237 words) - 21:13, 9 May 2025
crossing numbers equal to their crossing numbers. Turán, P. (1977), "A note of welcome", Journal of Graph Theory, 1: 7–9, doi:10.1002/jgt.3190010105. Pach...
13 KB (1,513 words) - 08:14, 11 January 2024
unions of isomorphic complete graphs, the Turán graphs formed as the complement graphs of mKn, the 3 × 3 rook's graph, and the 5-cycle. The only countably...
6 KB (513 words) - 22:28, 25 March 2025
Zarankiewicz problem (redirect from Kövari–Sós–Turán theorem)
Kővári–Sós–Turán theorem provides an upper bound on the solution to the Zarankiewicz problem. It was established by Tamás Kővári, Vera T. Sós and Pál Turán shortly...
26 KB (5,119 words) - 04:08, 2 April 2025
Maximal independent set (category Graph theory objects)
n/k+1\rfloor ^{n{\bmod {k}}}.} The graphs achieving this bound are again Turán graphs. Certain families of graphs may, however, have much more restrictive...
40 KB (5,451 words) - 22:03, 17 March 2025
Adjacency matrix (redirect from Adjacency matrix of a bipartite graph)
Representations of graphs", Introduction to Algorithms (Second ed.), MIT Press and McGraw-Hill, pp. 527–531, ISBN 0-262-03293-7. Turán, György (1984), "On...
20 KB (2,453 words) - 03:31, 18 May 2025
for r = 2 by Turán (1941), and the problem for general r was introduced in Turán (1961). The paper (Sidorenko 1995) gives a survey of Turán numbers. Fix...
3 KB (345 words) - 22:12, 21 March 2025
Equitable coloring (category Graph coloring)
equitable coloring is that it is an embedding of the given graph as a subgraph of a Turán graph with the same set of vertices. There are two kinds of chromatic...
19 KB (2,290 words) - 08:16, 16 July 2024
disjoint union of one or more equal-sized complete graphs, and their complements, the Turán graphs. A Young tableau (pl.: tableaux) is a combinatorial...
13 KB (1,289 words) - 14:02, 16 October 2024