Energy, Hosoya index and Merrifield-Simmons index of trees with prescribed degree sequence

  • Authors:
  • Eric Ould Dadah Andriantiana

  • Affiliations:
  • -

  • Venue:
  • Discrete Applied Mathematics
  • Year:
  • 2013

Quantified Score

Hi-index 0.04

Visualization

Abstract

The energy of a graph, defined as the sum of the absolute values of its eigenvalues, the number of independent edge subsets (known as Hosoya index) and the number of independent vertex subsets (called Merrifield-Simmons index) are three closely related graph invariants that are studied in mathematical chemistry. In this paper, we characterize the unique (up to isomorphism) tree which has a given degree sequence, minimum energy and Hosoya index and maximum Merrifield-Simmons index. We also compare different degree sequences and show how various known results follow as simple corollaries from our main theorem.