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A drawing of a graph with 6 vertices and 7 edges.. In mathematics and computer science, graph theory is the study of graphs, which are mathematical structures used to model pairwise relations between objects.
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 discrete mathematics, and more specifically in graph theory, a vertex (plural vertices) or node is the fundamental unit of which graphs are formed: an undirected graph consists of a set of vertices and a set of edges (unordered pairs of vertices), while a directed graph ...
In graph theory, a tree is an undirected graph in which any two vertices are connected by exactly one path, or equivalently a connected acyclic undirected graph. [1] A forest is an undirected graph in which any two vertices are connected by at most one path, or equivalently an acyclic undirected graph, or equivalently a disjoint union of trees.
In graph theory, a cut is a partition of the vertices of a graph into two disjoint subsets. [1] Any cut determines a cut-set, the set of edges that have one endpoint in each subset of the partition.
Every tree has queue number 1, with a vertex ordering given by a breadth-first traversal. [3] Pseudoforests and grid graphs also have queue number 1. [4] Outerplanar graphs have queue number at most 2; the 3-sun graph (a triangle with each of its edges replaced by a triangle) is an example of an outerplanar graph whose queue number is exactly 2. [5]
The graph of the 3-3 duoprism (the line graph of ,) is perfect.Here it is colored with three colors, with one of its 3-vertex maximum cliques highlighted. In graph theory, a perfect graph is a graph in which the chromatic number equals the size of the maximum clique, both in the graph itself and in every induced subgraph.
Cầu Giấy (anglicized as Cau Giay) is an urban district of Hanoi, the capital city of Vietnam.It is located roughly to the west of urban Hanoi. Cầu Giấy has a unique urban landscape, with new urban developments interlacing old historical artisan villages.
Sex, Lies, and Videotape (often written in all lowercase as sex, lies, and videotape) is a 1989 American independent drama film written and directed by Steven Soderbergh.The plot tells the story of a troubled man who videotapes women discussing their sexuality and fantasies, and its impact on the relationships of a troubled married couple and the wife's younger sister.