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Counting spanning trees in a small-world Farey graph

Author

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  • Zhang, Zhongzhi
  • Wu, Bin
  • Lin, Yuan

Abstract

The problem of spanning trees is closely related to various interesting problems in the area of statistical physics, but determining the number of spanning trees in general networks is computationally intractable. In this paper, we perform a study on the enumeration of spanning trees in a specific small-world network with an exponential distribution of vertex degrees, which is called a Farey graph since it is associated with the famous Farey sequence. According to the particular network structure, we provide some recursive relations governing the Laplacian characteristic polynomials of a Farey graph and its subgraphs. Then, making use of these relations obtained here, we derive the exact number of spanning trees in the Farey graph, as well as an approximate numerical solution for the asymptotic growth constant characterizing the network. Finally, we compare our results with those of different types of networks previously investigated.

Suggested Citation

  • Zhang, Zhongzhi & Wu, Bin & Lin, Yuan, 2012. "Counting spanning trees in a small-world Farey graph," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 391(11), pages 3342-3349.
    • Handle: RePEc:eee:phsmap:v:391:y:2012:i:11:p:3342-3349
    DOI: 10.1016/j.physa.2012.01.039
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    Citations

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    Cited by:

    1. Zhang, Jingyuan & Yan, Weigen, 2020. "Counting spanning trees of a type of generalized Farey graphs," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 555(C).
    2. Sun, Daoqiang & Li, Long & Liu, Kai & Wang, Hua & Yang, Yu, 2022. "Enumeration of subtrees of planar two-tree networks," Applied Mathematics and Computation, Elsevier, vol. 434(C).
    3. Liang, Jing & Zhao, Haixing & Yin, Jun & Xie, Sun, 2022. "Entropy and enumeration of spanning connected unicyclic subgraphs in self-similar network," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 590(C).

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