Zhenxi Huang

A New Proof of the Four Color Theorem

The Four Color Theorem states that every finite map on the sphere can be colored with at most four colors so that any two adjacent regions receive different colors. In this paper, we study the theorem from a topological and graph-theoretic point of view and introduce a strengthen...

A New Proof of the Four Color Theorem

The Four Color Theorem states that every finite map on the sphere can be colored with at most four colors so that any two adjacent regions receive different colors. In this paper, we study the theorem from a topological and graph-theoretic point of view and introduce a strengthen...