https://www.unsw.edu.au/science/our-schools/maths/engage-with-us/seminars/2013/proof-four-colour-theorem
The Proof of the Four Colour Theorem | School of Mathematics and Statistics
four colour theoremproofschoolmathematicsstatistics
https://arxiv.org/abs/2212.09835
[2212.09835] A non-constructive proof of the Four Colour Theorem
Abstract page for arXiv paper 2212.09835: A non-constructive proof of the Four Colour Theorem
non constructive proofthe four2212