When.com Web Search

Search results

1. Results From The WOW.Com Content Network

2. Graph (discrete mathematics) - Wikipedia

   en.wikipedia.org/wiki/Graph_(discrete_mathematics)

   In discrete mathematics, particularly in graph theory, a graph is a structure consisting of a set of objects where some pairs of the objects are in some sense "related". The objects are represented by abstractions called vertices (also called nodes or points ) and each of the related pairs of vertices is called an edge (also called link or line ...

3. Graph theory - Wikipedia

   en.wikipedia.org/wiki/Graph_theory

   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 in this context is made up of vertices (also called nodes or points ) which are connected by edges (also called arcs , links or lines ).

4. List coloring - Wikipedia

   en.wikipedia.org/wiki/List_coloring

   For a graph G, let χ(G) denote the chromatic number and Δ(G) the maximum degree of G.The list coloring number ch(G) satisfies the following properties.. ch(G) ≥ χ(G).A k-list-colorable graph must in particular have a list coloring when every vertex is assigned the same list of k colors, which corresponds to a usual k-coloring.

5. Discharging method (discrete mathematics) - Wikipedia

   en.wikipedia.org/wiki/Discharging_method...

   The discharging method is used to prove that every graph in a certain class contains some subgraph from a specified list. The presence of the desired subgraph is then often used to prove a coloring result. [1] Most commonly, discharging is applied to planar graphs. Initially, a charge is assigned to each face and each vertex of the graph. The ...

6. Vertex (graph theory) - Wikipedia

   en.wikipedia.org/wiki/Vertex_(graph_theory)

   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 ...

7. Category:Unsolved problems in graph theory - Wikipedia

   en.wikipedia.org/wiki/Category:Unsolved_problems...

   Upload file; Search. Search. Appearance. ... Download as PDF; Printable version; In other projects ... Pages in category "Unsolved problems in graph theory" The ...