EntityQ913598· pop 20· linked from 204 articlescomplete bipartite graphSign in to saveevery vertex of first set attached to every vertex of second setConnectionsthree utilities problemEntitystar graphEntityedge coloringEntityTurán's theoremEntitymathematicsEntityLeonhard EulerEntityInternational Standard Book NumberEntitydigital object identifierEntityDonald KnuthEntitygraph theoryEntityRamon LlullEntityAthanasius KircherEntitySeven Bridges of KönigsbergEntitybinary relationEntitytreeEntitycomplete graphEntityLászló LovászEntitynodeEntitySpringer Science+Business MediaEntityplanar graphEntityCategoriesParametric families of graphs