Theorems on Planar Graphs
Vedavathi N.1, Dharmaiah Gurram2
1Vedavathi, N.,  Asst. Professor of Mathematics in K.L. University, Guntur, (Andhra Pradesh), India.
2Dharmaiah Gurram, Asst. Professor of Mathematics in K.L. University, Guntur, (Andhra Pradesh), India.
Manuscript received on January 23, 2013. | Revised Manuscript received on February 10, 2013. | Manuscript published on February 28, 2013. | PP: 510-512 | Volume-2 Issue-3, February 2013.  | Retrieval Number: C1203022313/2013©BEIESP

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Abstract: Graph coloring is a well-known and well-studied area of graph theory with many applications. In this paper, we will discuss list precoloring extensions.
Keywords: 5-list-coloring, 2-connected, P -separating 3-cycle.