Graph Theory terminology

Character images, Except "Woman with blue blazer, white skirt, black hair" [0:09-0:12] and [0:43-1:10] and car and giraffe icons [1:17-1:24] are all © Getty used and modified by Deakin University under licence.

Image of Haken and Appel [0:13-0:18] is used and adapted with permission from University of Illinois Urbana-Champaign.