French Nombre de contact Cited by user Vers75 on 20 Feb 2021 En géométrie, le nombre de contact ou nombre de Newton ou nombre de baisers (de l'anglais kissing number) d'un
English Kissing number problem Cited by user F.Kammer on 12 Jan 2017 In geometry, a kissing number is defined as the number of non-overlapping unit spheres that can be arranged such that they each touch another given unit sphere.