English Sumner's conjecture Cited by user Citation bot on 08 May 2024 {{unsolved|mathematics|Does every by Daniela Kühn, Richard Mycroft, and Deryk Osthus.
Spanish Óvalo (plano proyectivo) Cited by user Wiki LIC on 12 Oct 2023 [[File:Oval-definition-en.svg|thumb|300px|Para la definición de un óvalo:.
English Herschel graph Cited by user David Eppstein on 24 Dec 2022 In graph theory, a branch of mathematics, the Herschel graph is a bipartite undirected graph with 11 vertices and 18 edges.
English Intersection number (graph theory) Cited by user David Eppstein on 21 Sep 2022 In the mathematical field of graph theory, the intersection number of a graph. The intersection number is NP-hard to compute or approximate, but fixed-parameter tractable.
