Extremal tricyclic, tetracyclic, and pentacyclic graphs with respect to the Narumi–Katayama index

  • Ali Reza Ashrafi Department of Pure Mathematics, Faculty of Mathematical Sciences, University of Kashan, Kashan 87317-53153, I. R. Iran
  • Mehdi Eliasi Department of Mathematics, Khansar Faculty of Computer and Mathematical Sciences, Khansar, I. R. Iran
  • Ali Ghalavand Department of Pure Mathematics, Faculty of Mathematical Sciences, University of Kashan, Kashan 87317-53153, I. R. Iran
  • Ottorino Ori Actinum Chemical Research, Rome, Italy
Keywords: Narumi–Katayama index, tricyclic graph, tetracyclic graph, pentacyclic graph

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Published
2019-01-02
Section
Articles