نتایج جستجو برای: estrada index
تعداد نتایج: 396787 فیلتر نتایج به سال:
Ernesto Estrada Department of Mathematics and Statistics, University of Strathclyde, Glasgow G1 1XH, UK The discriminant power of centrality indices for the degree, eigenvector, closeness, betweenness and subgraph centrality is analyzed. It is defined by the number of graphs for which the standard deviation of the centrality of its nodes is zero. On the basis of empirical analysis it is conclud...
Abstract The n-th order Wiener index of a molecular graph G was put forward by Estrada et al. [New J. Chem. 22 (1998) 819] as ( ) 1 ( , ) n n x W H G x where ( , ) H G x is the Hosoya polynomial. Recently Brückler et al. [Chem. Phys. Lett. 503 (2011) 336] considered a related graph invariant, ( ) 1 1 (1/ !) ( ( , )) / n n n n x W n d x H G x d x . For n=1, both W and W reduce to the ordinary W...
Model Checking of tccp programs Maŕıa Alpuente 1 ,2 Maŕıa del Mar Gallardo 1 ,3 Ernesto Pimentel ,4 Alicia Villanueva 1 ,5
Marta Coll*, Chiara Piroddi, Jeroen Steenbeek, Kristin Kaschner, Frida Ben Rais Lasram, Jacopo Aguzzi, Enric Ballesteros, Carlo Nike Bianchi, Jordi Corbera, Thanos Dailianis, Roberto Danovaro, Marta Estrada, Carlo Froglia, Bella S. Galil, Josep M. Gasol, Ruthy Gertwagen, João Gil, François Guilhaumon, Kathleen Kesner-Reyes, Miltiadis-Spyridon Kitsos, Athanasios Koukouras, Nikolaos Lampadariou, ...
Let G be a simple undirected graph on n vertices. V. Nikiforov studied hybrids of AG and DG defined the matrix AαG for every real α∈[0,1] as AαG=αDG+(1−α)AG. In this paper, we define generalized Randić G, introduce establish bounds Estrada index new matrix. Furthermore, find smallest value α which is positive semidefinite. Finally, present solution to problem proposed by Nikiforov. The consists...
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