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Maxima and Minima of the Hosoya Index and the Merrifield-Simmons Index

A survey of results and techniques

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Abstract

The Hosoya index and the Merrifield-Simmons index are typical examples of graph invariants used in mathematical chemistry for quantifying relevant details of molecular structure. In recent years, quite a lot of work has been done on the extremal problem for these two indices, i.e., the problem of determining the graphs within certain prescribed classes that maximize or minimize the index value. This survey collects and classifies these results, and also provides some useful auxiliary results, tools and techniques that are frequently used in the study of this type of problem.

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References

  1. Alameddine, A.F.: Bounds on the Fibonacci number of a maximal outerplanar graph. Fibonacci Q. 36(3), 206–210 (1998)

    MATH  MathSciNet  Google Scholar 

  2. Bai, Y., Zhao, B., Zhao, P.: Extremal Merrifield-Simmons index and Hosoya index of polyphenyl chains. MATCH Commun. Math. Comput. Chem. 62(3), 649–656 (2009)

    MATH  MathSciNet  Google Scholar 

  3. Bruyère, V., Mélot, H.: Fibonacci index and stability number of graphs: a polyhedral study. J. Comb. Optim. 18(3), 207–228 (2009)

    Article  MATH  MathSciNet  Google Scholar 

  4. Cao, Y., Zhang, F.: Extremal polygonal chains on k-matchings. MATCH Commun. Math. Comput. Chem. 60(1), 217–235 (2008)

    MATH  MathSciNet  Google Scholar 

  5. Chen, Y., Wen, S.: On the total number of matchings of trees with prescribed diameter. Int. J. Nonlinear Sci. 4(1), 37–43 (2007)

    MathSciNet  Google Scholar 

  6. Cvetković, D.M., Doob, M., Gutman, I., Torgašev, A.: Recent Results in the Theory of Graph Spectra. North-Holland, Amsterdam (1988)

    MATH  Google Scholar 

  7. Cvetković, D., Doob, M., Sachs, H.: Spectra of Graphs—Theory and Application. Academic Press, New York (1980)

    Google Scholar 

  8. Deng, H.: The largest Hosoya index of (n,n+1)-graphs. Comput. Math. Appl. 56(10), 2499–2506 (2008)

    Article  MATH  MathSciNet  Google Scholar 

  9. Deng, H.: The smallest Hosoya index in (n,n+1)-graphs. J. Math. Chem. 43(1), 119–133 (2008)

    Article  MATH  MathSciNet  Google Scholar 

  10. Deng, H.: The smallest Merrifield-Simmons index of (n,n+1)-graphs. Math. Comput. Model. 49(1–2), 320–326 (2009)

    Article  MATH  Google Scholar 

  11. Deng, H., Chen, S.: The extremal unicyclic graphs with respect to Hosoya index and Merrifield-Simmons index. MATCH Commun. Math. Comput. Chem. 59(1), 171–190 (2008)

    MATH  MathSciNet  Google Scholar 

  12. Deng, H., Chen, S., Zhang, J.: The Merrifield-Simmons index in (n,n+1)-graphs. J. Math. Chem. 43(1), 75–91 (2008)

    Article  MATH  MathSciNet  Google Scholar 

  13. Deng, H., Guo, Q.: On the minimal Merrifield-Simmons index of trees of order n with at least [n/2]+1 pendent vertices. MATCH Commun. Math. Comput. Chem. 60(2), 601–608 (2008)

    MATH  MathSciNet  Google Scholar 

  14. Diestel, R.: Graph Theory, 3rd edn. Graduate Texts in Mathematics, vol. 173. Springer-Verlag, Berlin (2005)

    MATH  Google Scholar 

  15. Fischermann, M., Gutman, I., Hoffmann, A., Rautenbach, D., Vidović, D., Volkmann, L.: Extremal chemical trees. Z. Naturforsch. 57a, 49–52 (2002)

    Google Scholar 

  16. Gao, Y.D., Hosoya, H.: Topological index and thermodynamic properties. IV. Size dependency of the structure activity correlation of alkanes. Bull. Chem. Soc. Jpn. 61, 3093–3102 (1988)

    Article  Google Scholar 

  17. Godsil, C.D., Gutman, I.: On the theory of the matching polynomial. J. Graph Theory 5, 137–144 (1981)

    Article  MATH  MathSciNet  Google Scholar 

  18. Gutman, I.: Acyclic systems with extremal Hückel π-electron energy. Theor. Chim. Acta 45, 79–87 (1977)

    Article  Google Scholar 

  19. Gutman, I.: The energy of a graph. Ber. Math.-Statist. Sekt. Forsch. Graz 103(100–105), 22 (1978)

    Google Scholar 

  20. Gutman, I.: A regularity for the boiling points of alkanes and its mathematical modeling. Z. Phys. Chem. (Leipzig) 267, 1152–1158 (1986)

    Google Scholar 

  21. Gutman, I.: Fragmentation formulas for the number of Kekulé structures, Hosoya and Merrifield-Simmons indices and related graph invariants. Coll. Sci. Pap. Fac. Sci. Kragujevac 11, 11–18 (1990)

    Google Scholar 

  22. Gutman, I.: Topological properties of benzenoid systems. Merrifield-Simmons indices and independence polynomials of unbranched catafusenes. Rev. Roum. Chim. 36, 379–388 (1991)

    Google Scholar 

  23. Gutman, I.: Extremal hexagonal chains. J. Math. Chem. 12(1–4), 197–210 (1993). Applied graph theory and discrete mathematics in chemistry (Saskatoon, SK, 1991)

    Article  MathSciNet  Google Scholar 

  24. Gutman, I.: The energy of a graph: old and new results. In: Algebraic Combinatorics and Applications, Gößweinstein, 1999, pp. 196–211. Springer, Berlin (2001)

    Google Scholar 

  25. Gutman, I., Furtula, B., Vidović, D., Hosoya, H.: A concealed property of the topological index Z. Bull. Chem. Soc. Jpn. 77, 491–496 (2004)

    Article  Google Scholar 

  26. Gutman, I., Hosoya, H., Uraković, G., Ristić, L.: Two variants of the topological index and the relations between them. Bull. Chem. Soc. Jpn. 65, 14–18 (1992)

    Article  Google Scholar 

  27. Gutman, I., Kolaković, N.: Hosoya index of the second kind of molecules containing a polyacene fragment. Bull. Acad. Serbe Sci. Arts (Clas. Sci. Math. Natur.) 102, 39–46 (1990)

    Google Scholar 

  28. Gutman, I., Li, X., Zhang, J.: Graph energy. In: Analysis of Complex Networks. From Biology to Linguistics, pp. 145–174. Wiley–VCH, Weinheim (2009)

    Google Scholar 

  29. Gutman, I., Polansky, O.E.: Mathematical Concepts in Organic Chemistry. Springer-Verlag, Berlin (1986)

    MATH  Google Scholar 

  30. Gutman, I., Vidović, D., Hosoya, H.: The relation between the eigenvalue sum and the topological index Z revisited. Bull. Chem. Soc. Jpn. 75, 1723–1727 (2002)

    Article  Google Scholar 

  31. Gutman, I., Yamaguchi, T., Hosoya, H.: Topological index as applied to π-electronic systems. IV. On the topological factors causing non-uniform π-electron charge distribution in non-alternant hydrocarbons. Bull. Chem. Soc. Jpn. 49, 1811–1816 (1976)

    Article  Google Scholar 

  32. Hedman, B.: Another extremal problem for Turán graphs. Discrete Math. 65(2), 173–176 (1987)

    Article  MATH  MathSciNet  Google Scholar 

  33. Heuberger, C., Wagner, S.: Maximizing the number of independent subsets over trees with bounded degree. J. Graph Theory 58(1), 49–68 (2008)

    Article  MATH  MathSciNet  Google Scholar 

  34. Heuberger, C., Wagner, S.: On a class of extremal trees for various indices. MATCH Commun. Math. Comput. Chem. 62(3), 437–464 (2009)

    MATH  MathSciNet  Google Scholar 

  35. Hosoya, H.: Topological index. A newly proposed quantity characterizing the topological nature of structural isomers of saturated hydrocarbons. Bull. Chem. Soc. Jpn. 44, 2332–2339 (1971)

    Article  Google Scholar 

  36. Hosoya, H.: Topological index as a sorting device for coding chemical structures. J. Chem. Doc. 12, 181–183 (1972)

    Article  Google Scholar 

  37. Hosoya, H.: Graphical enumeration of the coefficients of the secular polynomials of the Hückel molecular orbitals. Theor. Chim. Acta 25, 215–222 (1975)

    Article  MathSciNet  Google Scholar 

  38. Hosoya, H.: Topological index as a common tool for quantum chemistry, statistical mechanics, and graph theory. In: Mathematical and Computational Concepts in Chemistry (Dubrovnik, 1985). Ellis Horwood Ser. Math. Appl., pp. 110–123. Horwood, Chichester (1986)

    Google Scholar 

  39. Hosoya, H.: Chemical meaning of octane number analyzed by topological indices. Croat. Chem. Acta 75, 433–445 (2002)

    Google Scholar 

  40. Hosoya, H.: The topological index Z before and after 1971. Internet Electron. J. Mol. Des. 1, 428–442 (2002)

    Google Scholar 

  41. Hosoya, H.: Important mathematical structures of the topological index Z for tree graphs. J. Chem. Inf. Model. 47, 744–750 (2007)

    Article  Google Scholar 

  42. Hosoya, H.: Mathematical meaning and importance of the topological index Z. Croat. Chem. Acta 80, 239–249 (2007)

    Google Scholar 

  43. Hosoya, H., Gotoh, M., Murakami, M., Ikeda, S.: Topological index and thermodynamic properties. 5. How can we explain the topological dependence of thermodynamic properties of alkanes with the topology of graphs? J. Chem. Inf. Comput. Sci. 39, 192–196 (1999)

    Google Scholar 

  44. Hosoya, H., Gutman, I.: Kekulé structures of hexagonal chains—some unusual connections. J. Math. Chem. 44, 559–568 (2008)

    Article  MathSciNet  Google Scholar 

  45. Hosoya, H., Gutman, I., Nikolić, J.: Topological indices of unbranched catacondensed benzenoid hydrocarbons. Bull. Chem. Soc. Jpn. 65, 2011–2015 (1992)

    Article  Google Scholar 

  46. Hosoya, H., Hosoi, K.: Topological index as applied to π-electron systems. III. Mathematical relations among various bond orders. J. Chem. Phys. 64, 1065–1073 (1976)

    Article  Google Scholar 

  47. Hosoya, H., Hosoi, K., Gutman, I.: A topological index for the total π-electron energy. Proof of a generalised Hückel rule for an arbitrary network. Theor. Chim. Acta 38, 37–47 (1975)

    Article  MathSciNet  Google Scholar 

  48. Hosoya, H., Kawasaki, K., Mizutani, K.: Topological index and thermodynamic properties. I. Empirical rules on the boiling point of saturated hydrocarbons. Bull. Chem. Soc. Jpn. 45, 3415–3421 (1972)

    Article  Google Scholar 

  49. Hosoya, H., Murakami, M.: Topological index as applied to π-electronic systems. II. Topological bond order. Bull. Chem. Soc. Jpn. 48, 3512–3517 (1975)

    Article  Google Scholar 

  50. Hou, Y.: Unicyclic graphs with minimal energy. J. Math. Chem. 29(3), 163–168 (2001)

    Article  MATH  MathSciNet  Google Scholar 

  51. Hou, Y.: On acyclic systems with minimal Hosoya index. Discrete Appl. Math. 119(3), 251–257 (2002)

    Article  MATH  MathSciNet  Google Scholar 

  52. Hua, H.: Hosoya index of unicyclic graphs with prescribed pendent vertices. J. Math. Chem. 43(2), 831–844 (2008)

    Article  MATH  MathSciNet  Google Scholar 

  53. Hua, H.: Minimizing a class of unicyclic graphs by means of Hosoya index. Math. Comput. Model. 48(5–6), 940–948 (2008)

    Article  MATH  Google Scholar 

  54. Knopfmacher, A., Tichy, R.F., Wagner, S., Ziegler, V.: Graphs, partitions and Fibonacci numbers. Discrete Appl. Math. 155(10), 1175–1187 (2007)

    Article  MATH  MathSciNet  Google Scholar 

  55. Li, N., Li, S.: On the extremal energies of trees. MATCH Commun. Math. Comput. Chem. 59(2), 291–314 (2008)

    MATH  MathSciNet  Google Scholar 

  56. Li, S., Li, N.: On minimal energies of acyclic conjugated molecules. MATCH Commun. Math. Comput. Chem. 61(2), 341–349 (2009)

    MathSciNet  Google Scholar 

  57. Li, S., Li, X.: The fourth maximal energy of acyclic graphs. MATCH Commun. Math. Comput. Chem. 61(2), 383–394 (2009)

    MATH  MathSciNet  Google Scholar 

  58. Li, S., Li, X., Jing, W.: On the extremal Merrifield-Simmons index and Hosoya index of quasi-tree graphs. Discrete Appl. Math. 157(13), 2877–2885 (2009)

    Article  MATH  MathSciNet  Google Scholar 

  59. Li, S., Li, X., Zhu, Z.: On minimal energy and Hosoya index of unicyclic graphs. MATCH Commun. Math. Comput. Chem. 61(2), 325–339 (2009)

    MATH  MathSciNet  Google Scholar 

  60. Li, S., Zhu, Z.: The number of independent sets in unicyclic graphs with a given diameter. Discrete Appl. Math. 157(7), 1387–1395 (2009)

    Article  MATH  MathSciNet  Google Scholar 

  61. Li, X., Li, Z., Wang, L.: The inverse problems for some topological indices in combinatorial chemistry. J. Comput. Biol. 10(1), 47–55 (2003)

    Article  Google Scholar 

  62. Li, X., Zhao, H., Gutman, I.: On the Merrifield-Simmons index of trees. MATCH Commun. Math. Comput. Chem. 54(2), 389–402 (2005)

    MATH  MathSciNet  Google Scholar 

  63. Li, X., Zheng, J.: A unified approach to the extremal trees for different indices. MATCH Commun. Math. Comput. Chem. 54(1), 195–208 (2005)

    MATH  MathSciNet  Google Scholar 

  64. Lin, S.B., Lin, C.: Trees and forests with large and small independent indices. Chin. J. Math. 23(3), 199–210 (1995)

    MATH  Google Scholar 

  65. Linek, V.: Bipartite graphs can have any number of independent sets. Discrete Math. 76, 131–136 (1989)

    Article  MATH  MathSciNet  Google Scholar 

  66. Liu, H., Lu, M.: A unified approach to extremal cacti for different indices. MATCH Commun. Math. Comput. Chem. 58(1), 183–194 (2007)

    MATH  MathSciNet  Google Scholar 

  67. Liu, H., Yan, X., Yan, Z.: On the Merrifield-Simmons indices and Hosoya indices of trees with a prescribed diameter. MATCH Commun. Math. Comput. Chem. 57(2), 371–384 (2007)

    MATH  MathSciNet  Google Scholar 

  68. Lv, X., Yan, Y., Yu, A., Zhang, J.: Ordering trees with given pendent vertices with respect to Merrifield-Simmons indices and Hosoya indices. J. Math. Chem. 47(1), 11–20 (2010)

    Article  MATH  MathSciNet  Google Scholar 

  69. Lv, X., Yu, A.: The Merrifield-Simmons indices and Hosoya indices of trees with a given maximum degree. MATCH Commun. Math. Comput. Chem. 56(3), 605–616 (2006)

    MATH  MathSciNet  Google Scholar 

  70. Mateljević, M., Gutman, I.: Note on the Coulson and Coulson–Jacobs integral formulas. MATCH Commun. Math. Comput. Chem. 59, 257–268 (2008)

    MATH  MathSciNet  Google Scholar 

  71. Merrifield, R.E., Simmons, H.E.: The structure of molecular topological spaces. Theor. Chim. Acta 55, 55–75 (1980)

    Article  Google Scholar 

  72. Merrifield, R.E., Simmons, H.E.: Enumeration of structure-sensitive graphical subsets: theory. Proc. Natl. Acad. Sci. USA 78, 692–695 (1981)

    Article  MATH  MathSciNet  Google Scholar 

  73. Merrifield, R.E., Simmons, H.E.: Enumeration of structure-sensitive graphical subsets: calculations. Proc. Natl. Acad. Sci. USA 78, 1329–1332 (1981)

    Article  MATH  MathSciNet  Google Scholar 

  74. Merrifield, R.E., Simmons, H.E.: Topology of bonding in π-electron systems. Proc. Natl. Acad. Sci. USA 82, 1–3 (1985)

    Article  Google Scholar 

  75. Merrifield, R.E., Simmons, H.E.: Topological Methods in Chemistry. Wiley, New York (1989)

    Google Scholar 

  76. Narumi, H.: Statistico-mechanical aspect of the Hosoya index. Internet Electron. J. Mol. Des. 2, 375–382 (2003)

    Google Scholar 

  77. Narumi, H., Hosoya, H.: Topological index and thermodynamic properties. II. Analysis of the topological factors on the absolute entropy of acyclic saturated hydrocarbons. Bull. Chem. Soc. Jpn. 53, 1228–1237 (1980)

    Article  Google Scholar 

  78. Narumi, H., Hosoya, H.: Topological index and thermodynamic properties. III. Classification of various topological aspects of properties of acyclic saturated hydrocarbons. Bull. Chem. Soc. Jpn. 58, 1778–1786 (1985)

    Article  Google Scholar 

  79. Ou, J.: Maximal Hosoya index and extremal acyclic molecular graphs without perfect matching. Appl. Math. Lett. 19(7), 652–656 (2006)

    Article  MATH  MathSciNet  Google Scholar 

  80. Ou, J.: On extremal unicyclic molecular graphs with prescribed girth and minimal Hosoya index. J. Math. Chem. 42(3), 423–432 (2007)

    Article  MATH  MathSciNet  Google Scholar 

  81. Ou, J.: On acyclic molecular graphs with maximal Hosoya index, energy, and short diameter. J. Math. Chem. 43(1), 328–337 (2008)

    Article  MATH  MathSciNet  Google Scholar 

  82. Ou, J.: On extremal unicyclic molecular graphs with maximal Hosoya index. Discrete Appl. Math. 157(2), 391–397 (2009)

    Article  MATH  MathSciNet  Google Scholar 

  83. Pan, X.F., Sun, Z.R.: The (n,m)-graphs of minimum Hosoya index. MATCH Commun. Math. Comput. Chem. 64(3), 811–820 (2010)

    Google Scholar 

  84. Pan, X.-F., Xu, J.-M., Yang, C., Zhou, M.-J.: Some graphs with minimum Hosoya index and maximum Merrifield-Simmons index. MATCH Commun. Math. Comput. Chem. 57(1), 235–242 (2007)

    MATH  MathSciNet  Google Scholar 

  85. Pedersen, A.S., Vestergaard, P.D.: The number of independent sets in unicyclic graphs. Discrete Appl. Math. 152(1–3), 246–256 (2005)

    Article  MATH  MathSciNet  Google Scholar 

  86. Pedersen, A.S., Vestergaard, P.D.: Bounds on the number of vertex independent sets in a graph. Taiwan. J. Math. 10(6), 1575–1587 (2006)

    MATH  MathSciNet  Google Scholar 

  87. Pedersen, A.S., Vestergaard, P.D.: An upper bound on the number of independent sets in a tree. Ars Comb. 84, 85–96 (2007)

    MATH  MathSciNet  Google Scholar 

  88. Prodinger, H., Tichy, R.F.: Fibonacci numbers of graphs. Fibonacci Q. 20(1), 16–21 (1982)

    MATH  MathSciNet  Google Scholar 

  89. Ren, H., Zhang, F.: Double hexagonal chains with maximal Hosoya index and minimal Merrifield-Simmons index. J. Math. Chem. 42(4), 679–690 (2007)

    Article  MathSciNet  Google Scholar 

  90. Ren, H., Zhang, F.: Extremal double hexagonal chains with respect to k-matchings and k-independent sets. Discrete Appl. Math. 155(17), 2269–2281 (2007)

    Article  MATH  MathSciNet  Google Scholar 

  91. Shiu, W.C.: Extremal Hosoya index and Merrifield-Simmons index of hexagonal spiders. Discrete Appl. Math. 156(15), 2978–2985 (2008)

    Article  MATH  MathSciNet  Google Scholar 

  92. Shiu, W.C., Lam, P.C.B., Zhang, L.-Z.: Extremal k -cycle resonant hexagonal chains. J. Math. Chem. 33(1), 17–28 (2003)

    Article  MATH  MathSciNet  Google Scholar 

  93. Simmons, H.E., Merrifield, R.E.: Mathematical description of molecular structure; Molecular topology. Proc. Natl. Acad. Sci. USA 74, 2616–2619 (1977)

    Article  MathSciNet  Google Scholar 

  94. Startek, M., Włoch, A., Włoch, I.: Fibonacci numbers and Lucas numbers in graphs. Discrete Appl. Math. 157(4), 864–868 (2009)

    Article  MATH  MathSciNet  Google Scholar 

  95. Tan, L., Zhu, Z.: The extremal Θ-graphs with respect to Hosoya index and Merrifield-Simmons index. MATCH Commun. Math. Comput. Chem. 63(3), 789–798 (2010)

    MathSciNet  Google Scholar 

  96. Tichy, R., Wagner, S.: Extremal problems for topological indices in combinatorial chemistry. J. Comput. Biol. 12(7), 1004–1013 (2005)

    Article  MATH  Google Scholar 

  97. Tichy, R.F., Wagner, S.: Algorithmic generation of molecular graphs with large Merrifield-Simmons index. MATCH Commun. Math. Comput. Chem. 59(1), 239–252 (2008)

    MATH  MathSciNet  Google Scholar 

  98. Todeschini, R., Consonni, V.: Handbook of Molecular Descriptors. Wiley–VCH, Weinheim (2000)

    Book  Google Scholar 

  99. Trinajstić, N.: Chemical Graph Theory. CRC Press, Boca Raton (1992)

    Google Scholar 

  100. Wagner, S.: Correlation of graph-theoretical indices. SIAM J. Discrete Math. 21(1), 33–46 (2007)

    Article  MATH  MathSciNet  Google Scholar 

  101. Wagner, S.: Extremal trees with respect to Hosoya index and Merrifield-Simmons index. MATCH Commun. Math. Comput. Chem. 57(1), 221–233 (2007)

    MATH  MathSciNet  Google Scholar 

  102. Wang, B., Ye, C., Zhao, H.: Extremal unicyclic graphs with respect to Merrifield-Simmons index. MATCH Commun. Math. Comput. Chem. 59(1), 203–216 (2008)

    MATH  MathSciNet  Google Scholar 

  103. Wang, H., Hua, H.: Unicycle graphs with extremal Merrifield-Simmons index. J. Math. Chem. 43(1), 202–209 (2008)

    Article  MATH  MathSciNet  Google Scholar 

  104. Wang, M., Hua, H., Wang, D.: The first and second largest Merrifield-Simmons indices of trees with prescribed pendent vertices. J. Math. Chem. 43(2), 727–736 (2008)

    Article  MATH  MathSciNet  Google Scholar 

  105. Wang, Y., Li, X., Gutman, I.: More examples and counterexamples for a conjecture of Merrifield and Simmons. Publ. Inst. Math. (Beograd) 69, 41–50 (2001)

    MathSciNet  Google Scholar 

  106. Xu, L.: The second largest Hosoya index of unicyclic graphs. MATCH Commun. Math. Comput. Chem. 62(3), 621–628 (2009)

    MATH  MathSciNet  Google Scholar 

  107. Xu, K.: On the Hosoya index and the Merrifield-Simmons index of graphs with a given clique number. Appl. Math. Lett. 23(4), 395–398 (2010)

    Article  MATH  MathSciNet  Google Scholar 

  108. Xu, K., Xu, B.: Some extremal unicyclic graphs with respect to Hosoya index and Merrifield-Simmons index. MATCH Commun. Math. Comput. Chem. 62(3), 629–648 (2009)

    MATH  MathSciNet  Google Scholar 

  109. Hua, H.: On maximal energy and Hosoya index of trees without perfect matching. Bull. Aust. Math. Soc. 81(1), 47–57 (2010)

    Article  MATH  MathSciNet  Google Scholar 

  110. Yan, W., Ye, L.: On the maximal energy and the Hosoya index of a type of trees with many pendant vertices. MATCH Commun. Math. Comput. Chem. 53(2), 449–459 (2005)

    MATH  MathSciNet  Google Scholar 

  111. Yan, W., Ye, L.: On the minimal energy of trees with a given diameter. Appl. Math. Lett. 18(9), 1046–1052 (2005)

    Article  MATH  MathSciNet  Google Scholar 

  112. Yan, Z., Liu, H., Liu, H.: The maximal Merrifield-Simmons indices and minimal Hosoya indices of unicyclic graphs. MATCH Commun. Math. Comput. Chem. 59(1), 157–170 (2008)

    MATH  MathSciNet  Google Scholar 

  113. Ye, C., Wang, J.: Trees with m-matchings and the fourth and fifth minimal Hosoya index. Comput. Math. Appl. 56(2), 387–399 (2008)

    Article  MATH  MathSciNet  Google Scholar 

  114. Ye, C., Wang, J., Zhao, H.: Trees with m-matchings and the third minimal Hosoya index. MATCH Commun. Math. Comput. Chem. 56(3), 593–604 (2006)

    MATH  MathSciNet  Google Scholar 

  115. Ye, L., Chen, R.S.: Ordering of trees with a given bipartition by their energies and Hosoya indices. MATCH Commun. Math. Comput. Chem. 52, 193–208 (2004)

    MATH  Google Scholar 

  116. Ye, Y., Pan, X.-F., Liu, H.: Ordering unicyclic graphs with respect to Hosoya indices and Merrifield-Simmons indices. MATCH Commun. Math. Comput. Chem. 59(1), 191–202 (2008)

    MATH  MathSciNet  Google Scholar 

  117. Yu, A., Lv, X.: The Merrifield-Simmons indices and Hosoya indices of trees with k pendant vertices. J. Math. Chem. 41(1), 33–43 (2007)

    Article  MATH  MathSciNet  Google Scholar 

  118. Yu, A., Tian, F.: A kind of graphs with minimal Hosoya indices and maximal Merrifield-Simmons indices. MATCH Commun. Math. Comput. Chem. 55(1), 103–118 (2006)

    MATH  MathSciNet  Google Scholar 

  119. Zeng, Y.: The bounds of Hosoya index and Merrifield-Simmons index for polyomino chains. J. Math. Study 41(3), 256–263 (2008)

    MATH  MathSciNet  Google Scholar 

  120. Zeng, Y., Zhang, F.: Extremal polyomino chains on k-matchings and k-independent sets. J. Math. Chem. 42(2), 125–140 (2007)

    Article  MATH  MathSciNet  Google Scholar 

  121. Zhang, B.: Remarks on minimal energies of unicyclic bipartite graphs. MATCH Commun. Math. Comput. Chem. 61, 487–494 (2009)

    MathSciNet  Google Scholar 

  122. Zhang, L.-Z.: The proof of Gutman’s conjectures concerning extremal hexagonal chains. J. Syst. Sci. Math. Sci. 18(4), 460–465 (1998)

    MATH  Google Scholar 

  123. Zhang, L.-Z.: On the ordering of a class of hexagonal chains with respect to Merrifield-Simmons index. Syst. Sci. Math. Sci. 13(2), 219–224 (2000)

    MATH  Google Scholar 

  124. Zhang, L.-Z., Tian, F.: Extremal catacondensed benzenoids. J. Math. Chem. 34(1–2), 111–122 (2003)

    Article  MATH  MathSciNet  Google Scholar 

  125. Zhang, L.-Z., Zhang, F.-J.: Extremal hexagonal chains concerning k-matchings and k-independent sets. J. Math. Chem. 27(4), 319–329 (2000)

    Article  MATH  MathSciNet  Google Scholar 

  126. Zhao, H., Li, X.: On the Fibonacci numbers of trees. Fibonacci Q. 44(1), 32–38 (2006)

    MATH  Google Scholar 

  127. Zhao, H., Liu, R.: On the Merrifield-Simmons index of graphs. MATCH Commun. Math. Comput. Chem. 56(3), 617–624 (2006)

    MathSciNet  MATH  Google Scholar 

  128. Zhu, Z., Li, S., Tan, L.: Tricyclic graphs with maximum Merrifield-Simmons index. Discrete Appl. Math. 158(3), 204–212 (2010)

    Article  MATH  MathSciNet  Google Scholar 

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Wagner, S., Gutman, I. Maxima and Minima of the Hosoya Index and the Merrifield-Simmons Index. Acta Appl Math 112, 323–346 (2010). https://doi.org/10.1007/s10440-010-9575-5

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  • DOI: https://doi.org/10.1007/s10440-010-9575-5

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Mathematics Subject Classification (2000)

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