EntityQ245595· pop 23· linked from 306 articlescycleSign in to savein graph theory, non-empty trail in which only the first and last vertices are equalConnectionsstrongly connected componentEntitytreeEntityLeonhard EulerEntityInternational Standard Book NumberEntitydigital object identifierEntityvector spaceEntitysupercomputerEntitygraph theoryEntityringEntitygraphEntityJSTOREntitySeven Bridges of KönigsbergEntityalgebraic topologyEntitybasisEntitymoduleEntitycomputer clusterEntitydepth-first searchEntitybreadth-first searchEntityQ22908627Entityfinite fieldEntityCategoriesGraph theory objects