On the Sum of the Powers of Distance Signless Laplacian Eigenvalues of Graphs

S. Pirzada (), Hilal A. Ganie (), A. Alhevaz () and M. Baghipur ()
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S. Pirzada: University of Kashmir
Hilal A. Ganie: University of Kashmir
A. Alhevaz: Shahrood University of Technology
M. Baghipur: University of Hormozgon

Indian Journal of Pure and Applied Mathematics, 2020, vol. 51, issue 3, 1143-1163

Abstract: Abstract Let G be a connected graph with n vertices, m edges and having distance signless Laplacian eigenvalues ρ1≥ ρ2 ≥ … ≥ ρn≥ 0. For any real number α ≠ 0, let $${m_\alpha }\left( G \right) = \sum\nolimits_{i = 1}^n {\rho _i^\alpha } $$ m α ( G ) = ∑ i = 1 n ρ i α be the sum of αth powers of the distance signless Laplacian eigenvalues of the graph G. In this paper, we obtain various bounds for the graph invariant mα(G), which connects it with different parameters associated to the structure of the graph G. We also obtain various bounds for the quantity DEL(G), the distance signless Laplacian-energy-like invariant of the graph G. These bounds improve some previously known bounds. We also pose some extremal problems about DEL(G).

Keywords: Graph; distance signless Laplacian matrix; distance signless Laplacian eigenvalues; transmission regular; 05C12; 05C50 (search for similar items in EconPapers)
Date: 2020
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Citations: View citations in EconPapers (1)

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DOI: 10.1007/s13226-020-0455-z

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