Journal of Dali University ›› 2026, Vol. 11 ›› Issue (6): 11-18.

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Several Studies on Complete t-Partite Graphs

  

  1. 1. School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China; 2. College of Mathematics and Computer
    Science, Dali University, Dali, Yunnan 671003, China)
  • Received:2025-05-26 Online:2026-06-15 Published:2026-06-30

Abstract: The article presents several achievements, problems, and conjectures in the study of complete t-partite graphs from seven
perspectives: (1) the counting formulas of S(n)-factors; (2) the counting formulas of the partitions of stable sets; (3) chromatic polynomials and unimodality; (4) mean color numbers; (5) independence numbers and independence polynomials; (6) the Hosoya index and the Merrifield-Simmons index; (7) the chromatic uniqueness. These findings enrich the intersection of extremal graph theory and algebraic graph theory.

Key words: S(n)-factor, stable set, chromatic polynomial, mean color number, independence polynomial

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