Kammüller, Florian2020-06-172020-06-1720081436-9915https://depositonce.tu-berlin.de/handle/11303/11403http://dx.doi.org/10.14279/depositonce-10287This article introduces and motivates idempotent relations. It summarizes characterizations of idempotents and their relationship to transitive relations and quasi-orders. Finally it presents a counting method for idempotent relations and lists the results for up to 6 points.en004 Datenverarbeitung; Informatikcounting methodlabelled partial ordersidempotent relationsResearch Paper