EntityQ6470127· pop 11· linked from 34 articlessnarkSign in to saveconnected, bridgeless cubic graph with chromatic index equal to 4ConnectionsgraphEntityfour color theoremEntityOn-Line Encyclopedia of Integer SequencesEntityplanar graphEntityPeter Guthrie TaitEntityW. T. TutteEntitycubic graphEntityminor graphEntitymathematicsEntityInternational Standard Book NumberEntityLewis CarrollEntitydigital object identifierEntitygraph theoryEntityMöbius stripEntityJSTOREntitybibcodeEntityQ118398EntityMartin GardnerEntityMathWorldEntityQ22908627EntityCategoriesGraph coloringGraph familiesGraph minor theoryRegular graphs