Alecu, BogdanLozin, Vadimde Werra, Dominique2023-04-242023-04-242023-04-242022-05-1510.1016/j.dam.2021.11.004https://infoscience.epfl.ch/handle/20.500.14299/197065WOS:000960547200002Cographs constitute a small point in the atlas of graph classes. However, by zooming in on this point, we discover a complex world, where many parameters jump from finiteness to infinity. In the present paper, we identify several milestones in the world of cographs and create a hierarchy of graph parameters grounded on these milestones.(c) 2021 Elsevier B.V. All rights reserved.Mathematics, AppliedMathematicscographsgraph parameterswell-quasi-orderingletter graphsbipartitesubclassestheoremsnumberordertext::journal::journal article::research article