The Wiener number (W) of a connected graph is the sum of distances for all pairs of vertices. As a graphical invariant, it has been found extensive application in chemistry. Considering the family of trees with n vertices and a fixed maximum vertex degree, we derive some methods that can strictly re
Trees Associated with the Motzkin Numbers
β Scribed by Alexander Kuznetsov; Igor Pak; Alexander Postnikov
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 179 KB
- Volume
- 76
- Category
- Article
- ISSN
- 0097-3165
No coin nor oath required. For personal study only.
β¦ Synopsis
We consider plane rooted trees on n+1 vertices without branching points on odd levels. The number of such trees in equal to the Motzkin number M n . We give a bijective proof of this statement.
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