EntityQ5597099· pop 5· linked from 12 articlesgraph toughnessSign in to savegraph invariantConnectionsintegerEntityreal numberEntityrational numberEntitydigital object identifierEntitygraph theoryEntitycomplete graphEntityQ22908627EntityHamiltonian pathEntityNP-completeEntitylist of unsolved problems in mathematicsEntitynecessity and sufficiencyEntitydecision problemEntitycycle graphEntityMathematical ReviewsEntityconnected component of a graphEntityco-NPEntitygraph connectivity measureEntitypath graphEntityVáclav ChvátalEntityk-vertex-connected graphEntityCategoriesGraph connectivityGraph invariantsNP-complete problems