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has been cited by the following article:

• TITLE: L(2,1)-Labeling Number of the Product and the Join Graph on Two Fans

  AUTHORS: Sumei Zhang, Qiaoling Ma

  KEYWORDS: Labeling Number; Join Graph; Product Graph

  JOURNAL NAME: Applied Mathematics, Vol.4 No.7, July 16, 2013

  ABSTRACT: L(2,1)-labeling number of the product and the join graph on two fans are discussed in this paper, we proved that L(2,1)-labeling number of the product graph on two fans isλ(G) ≤ Δ+3 , L(2,1)-labeling number of the join graph on two fans isλ(G) ≤ 2Δ+3.