## edge

### In mathematics, an edge refers to a line segment that connects two vertices of a graph

In mathematics, an edge refers to a line segment that connects two vertices of a graph. A graph is a collection of points, called vertices or nodes, and the connections between them are represented by edges.

Edges can have different characteristics depending on the specific type of graph. In a directed graph, also known as a digraph, an edge has a specific direction indicating a one-way connection between two vertices. In contrast, an undirected graph has edges that do not have a specific direction, representing a two-way connection between vertices.

The number of edges in a graph can vary greatly and has an impact on its structure and properties. For example, the degree of a vertex is the number of edges that are connected to it.

Edges are fundamental in graph theory and are used to model and analyze relationships between entities in various fields such as computer science, social networks, transportation systems, and more. They provide valuable insights into the connectivity and interactions within a system, allowing mathematicians and researchers to study complex networks.

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