# leaves -- lists the leaves of a tree graph

## Synopsis

• Usage:
L = leaves G
• Inputs:
• G, an instance of the type Graph,
• Outputs:
• L, a list, list of leaves of a tree graph

## Description

A vertex of a tree graph is a leaf if the degree of the vertex is 1

 i1 : G = graph({{1,2},{1,3},{3,4},{3,5}},EntryMode=>"edges"); i2 : leaves G;