-- -*- M2-comint -*- {* hash: 1359178877 *} i1 : S = QQ[a..d]; i2 : g = graph {a*b,b*c,c*d,d*a} -- the four cycle o2 = Graph{edges => {{a, b}, {b, c}, {a, d}, {c, d}}} ring => S vertices => {a, b, c, d} o2 : Graph i3 : vertices g o3 = {a, b, c, d} o3 : List i4 : h = hyperGraph{a*b*c} o4 = HyperGraph{edges => {{a, b, c}} } ring => S vertices => {a, b, c, d} o4 : HyperGraph i5 : vertices h -- the vertex d is treated as an isolated vertex o5 = {a, b, c, d} o5 : List i6 :