A loop is an edge that connects a vertex to itself. (See the illustration for degree which has a graph with three loops.) See pseudograph for a formal definition of loop.

An edge or arc from a vertex to itself is called a loop. Loops are not allowed in simple graphs or digraphs.

A type of edge jump on which the skater takes off from and lands on the same back outside edge.

a construct that is constructed by stringing together connected edges or linear segments, beginning and ending at the same vertex

an edge that joins a vertex to itself

an edge that starts and ends at the same vertex

an edge that starts at the same vertex as it ends and vice versa

an edge whose endpoints are identical, and a link is an edge with distinct endpoints

an edge whose endvertices are the same vertex

where an edge joins a vertex to itself

In a graph, an edge that connects a vertex to itself.