This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Grtzsch graph.svg Very hastily drawn image of the fourth Mycielski graph Mycielski proved in that for every kgekkkkge there is graph with chromatic number that contains no triangle subgraphs that is whose maximal clique size is just The chromati Grtzsch graph
Page 2023 Free-images.com. All images are Public Domain