internalEdges -- list the internal edges of a tree

• Usage:

  internalEdges T

• Inputs:
  • T, an instance of the type LeafTree,
• Outputs:
  • a list, the internal edges of T

i1 : G = graph {{0,4},{1,4},{4,5},{5,2},{5,3}};

i2 : T = leafTree G;

i3 : internalEdges T

o3 = {set {0, 1}}

o3 : List