i1 : D = digraph({{c, {e,h}}, {a, {b,c}}, {d, {f}}, {e, {f,g}}, {f, {}}, {g, {}}, {b,{d,e}}, {h, {}}}) o1 = Digraph{a => set {b, c}} b => set {d, e} c => set {e, h} d => set {f} e => set {f, g} f => set {} g => set {} h => set {} o1 : Digraph |
i2 : vertices D o2 = {b, d, f, g, c, e, h, a} o2 : List |