;; Defining Different Types of Graph and Hypergraph explicitly

(define mg (mbingraph))		; binary graph allowing multiple edges
(describe mg)

(define dhg (dhypergraph))	; hypergraph with directed edges (no 
				;  multiple edges allowed
(describe dhg)

(define bg (bingraph))		; binary graph allowing both directed and
				;  undirected edges and multiple occurrences
				;  of edges
