Inverse problem for Zagreb indices

Yurttas A., Togan M., Lokesha V., CANGÜL İ. N., Gutman I.

JOURNAL OF MATHEMATICAL CHEMISTRY, cilt.57, sa.2, ss.609-615, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 57 Sayı: 2
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1007/s10910-018-0970-x
  • Dergi Adı: JOURNAL OF MATHEMATICAL CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.609-615
  • Anahtar Kelimeler: Zagreb index, First Zagreb index, Second Zagreb index, Forgotten index, Hyper-Zagreb index, Primary 05C09, Secondary 05C90, TOPOLOGICAL INDEXES
  • Bursa Uludağ Üniversitesi Adresli: Evet

Özet

The inverse problem for integer-valued topological indices is about the existence of a graph having its index value equal to a given integer. We solve this problem for the first and second Zagreb indices, and present analogous results also for the forgotten and hyper-Zagreb index. The first Zagreb index of connected graphs can take any even positive integer value, except 4 and 8. The same is true if one restricts to trees or to molecular graphs. The second Zagreb index of connected graphs can take any positive integer value, except 2, 3, 5, 6, 7, 10, 11, 13, 15 and 17. The same is true if one restricts to trees or to molecular graphs.