isPerfect -- checks whether a graph is perfect

• Usage:

  p = isPerfect G

• Inputs:
  • G, a graph,
• Outputs:
  • p, a Boolean value, whether the graph is perfect

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

i2 : isPerfect G

o2 = true