J4 ›› 2009, Vol. 44 ›› Issue (8): 16-20.

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On the extremal Merrifield-Simmons index with  respect to trees having given number of endvertices

  

  1. 1. Department of Basic Research, Qinghai University, Xining 810017 , Qinghai, China;
     2. Continuing Education College, Weihai Branch, Shandong University, Weihai 264209, Shandong, China
  • Received:2008-12-04 Online:2009-08-16 Published:2009-11-08

Abstract:

The Merrifield-Simmons index for a 5-leaf tree of order n  is investiga ted, and the minimal Merrifield-Simmons index for a 5-leaf tree is characteri zed.

Key words: Merrifield-Simmons index; r-leave tree; Extrema

CLC Number: 

  • O157.5
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