Acta mathematica scientia,Series A ›› 2004, Vol. 24 ›› Issue (3): 369-374.

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A Note on the Polysums of Rooted Bitrees

 HAO Rong-Xia, LIU Pan-Pei, HE Wei-Li   

  • Online:2004-06-22 Published:2004-06-22
  • Supported by:

    国家自然基金(19831080和10271017)、北京交通大学校基金资助

Abstract:

In this paper, the chrosum equation of rooted bitrees with the valency of rooted vertex, the number of isthmus and the number of loops is gotten, and also the authers  present the explicit formulae for such maps with up to above three parameters and their degenerating cases.

Key words: Map, Polysum, Bitree

CLC Number: 

  • 05C45
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