J4 ›› 2010, Vol. 23 ›› Issue (1): 15-19.

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Intersection of Neighborhoods and Edge-Degree Conditions of λ-Optimal and Super-λ(k=2,3)Graphs

 YANG Ying-Ying, GAO Jing-Zhen, LI Xin   

  1. School of Mathematics, Shandong Normal University
  • Received:2009-09-12 Online:2010-02-20 Published:2010-02-20