Acta mathematica scientia,Series B ›› 2001, Vol. 21 ›› Issue (2): 243-248.

• Articles • Previous Articles     Next Articles

A SEVEN-COLOR THEOREM ON EDGE-FACE COLORING OF PLANE GRAPHS

 WANG Wei-Fan, ZHANG Ke-Min   

  1. Department of Mathematics, Liaoning University, Shenyang 110036, China Department of Mathematics, Nanjing University, Nanjing 210093, China
  • Online:2001-04-07 Published:2001-04-07

Abstract:

Melnikov(1975) conjectured that the edges and faces of a plane graph G can be colored with (G) + 3 colors so that any two adjacent or incident elements receive distinct colors, where (G) denotes the maximum degree of G. This paper proves the conjecture for the case (G)  4.

Key words: Plane graph, chromatic number, coloring

CLC Number: 

  • 05C15
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