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The generalized 3-connectivity of star graphs and bubble-sort graphs

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  • Li, Shasha
  • Tu, Jianhua
  • Yu, Chenyan

Abstract

For S ⊆ G, let κ(S) denote the maximum number r of edge-disjoint trees T1,T2,…,Tr in G such that V(Ti)∩V(Tj)=S for any i,j∈{1,2,⋯,r} and i ≠ j. For every 2 ≤ k ≤ n, the generalized k-connectivity of G κk(G) is defined as the minimum κ(S) over all k-subsets S of vertices, i.e., κk(G)= min {κ(S)|S⊆V(G)and|S|=k}. Clearly, κ2(G) corresponds to the traditional connectivity of G. The generalized k-connectivity can serve for measuring the capability of a network G to connect any k vertices in G. Cayley graphs have been used extensively to design interconnection networks. In this paper, we restrict our attention to two classes of Cayley graphs, the star graphs Sn and the bubble-sort graphs Bn, and investigate the generalized 3-connectivity of Sn and Bn. We show that κ3(Sn)=n−2 and κ3(Bn)=n−2.

Suggested Citation

  • Li, Shasha & Tu, Jianhua & Yu, Chenyan, 2016. "The generalized 3-connectivity of star graphs and bubble-sort graphs," Applied Mathematics and Computation, Elsevier, vol. 274(C), pages 41-46.
    • Handle: RePEc:eee:apmaco:v:274:y:2016:i:c:p:41-46
    DOI: 10.1016/j.amc.2015.11.016
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    References listed on IDEAS

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    1. Shasha Li & Xueliang Li, 2012. "Note on the hardness of generalized connectivity," Journal of Combinatorial Optimization, Springer, vol. 24(3), pages 389-396, October.
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    Cited by:

    1. Li, Yinkui & Wei, Liqun, 2023. "Note for the conjecture on the generalized 4-connectivity of total graphs of the complete bipartite graph," Applied Mathematics and Computation, Elsevier, vol. 458(C).
    2. Zhao, Shu-Li & Hao, Rong-Xia & Wei, Chao, 2022. "Internally disjoint trees in the line graph and total graph of the complete bipartite graph," Applied Mathematics and Computation, Elsevier, vol. 422(C).
    3. Hong Chang & Xueliang Li & Colton Magnant & Zhongmei Qin, 2018. "The $$(k,\ell )$$ ( k , ℓ ) -proper index of graphs," Journal of Combinatorial Optimization, Springer, vol. 36(2), pages 458-471, August.
    4. Zhao, Shu-Li & Hao, Rong-Xia, 2019. "The generalized 4-connectivity of exchanged hypercubes," Applied Mathematics and Computation, Elsevier, vol. 347(C), pages 342-353.
    5. Mao, Yaping, 2017. "Constructing edge-disjoint Steiner paths in lexicographic product networks," Applied Mathematics and Computation, Elsevier, vol. 308(C), pages 1-10.
    6. Gao, Hui & Lv, Benjian & Wang, Kaishun, 2018. "Two lower bounds for generalized 3-connectivity of Cartesian product graphs," Applied Mathematics and Computation, Elsevier, vol. 338(C), pages 305-313.
    7. Catanzaro, Daniele & Frohn, Martin & Pesenti, Raffaele, 2021. "A Massively Parallel Exact Solution Algorithm for the Balanced Minimum Evolution Problem," LIDAM Discussion Papers CORE 2021023, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
    8. Catanzaro, Daniele & Frohn, Martin & Gascuel, Olivier & Pesenti, Raffaele, 2023. "A Massively Parallel Exact Solution Algorithm for the Balanced Minimum Evolution Problem," LIDAM Discussion Papers CORE 2023001, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
    9. Li, Hengzhe & Wang, Jiajia, 2018. "The λ3-connectivity and κ3-connectivity of recursive circulants," Applied Mathematics and Computation, Elsevier, vol. 339(C), pages 750-757.
    10. Catanzaro, Daniele & Frohn, Martin & Gascuel, Olivier & Pesenti, Raffaele, 2022. "A tutorial on the balanced minimum evolution problem," European Journal of Operational Research, Elsevier, vol. 300(1), pages 1-19.
    11. Catanzaro, Daniele & Frohn, Martin & Gascuel, Olivier & Pesenti, Raffaele, 2021. "A Tutorial on the Balanced Minimum Evolution Problem," LIDAM Discussion Papers CORE 20210, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
    12. Li, Shasha & Zhao, Yan & Li, Fengwei & Gu, Ruijuan, 2019. "The generalized 3-connectivity of the Mycielskian of a graph," Applied Mathematics and Computation, Elsevier, vol. 347(C), pages 882-890.
    13. Catanzaro, Daniele & Frohn, Martin & Pesenti, Raffaele, 2021. "On Numerical Stability and Statistical Consistency of the Balanced Minimum Evolution Problem," LIDAM Discussion Papers CORE 2021026, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
    14. Zhang, Guozhen & Wang, Dajin, 2019. "Structure connectivity and substructure connectivity of bubble-sort star graph networks," Applied Mathematics and Computation, Elsevier, vol. 363(C), pages 1-1.
    15. Li, Hengzhe & Ma, Yingbin & Yang, Weihua & Wang, Yifei, 2017. "The generalized 3-connectivity of graph products," Applied Mathematics and Computation, Elsevier, vol. 295(C), pages 77-83.

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