Module Sig.G.V

module V: Sig.VERTEX 
Vertices have type V.t and are labeled with type V.label (note that an implementation may identify the vertex with its label)


Vertices are Sig.COMPARABLE.
type t 
val compare : t -> t -> int
val hash : t -> int
val equal : t -> t -> bool

Vertices are labeled.
type label 
val create : label -> t
val label : t -> label