Results 11 to 20 of about 6,027,070 (293)
The weighted vertex PI index [PDF]
Mathematical and Computer Modelling, 2013 Abstract The vertex PI index is a distance-based molecular structure descriptor, that recently found numerous chemical applications. In order to increase diversity of this topological index for bipartite graphs, we introduce a weighted version defined as P I w ( G ) = ∑ e = u v ∈ E ( d e g ( u ) + d e g (
Ilić, Aleksandar +1 more
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Vertex PI Index and Szeged Index of Certain Special Molecular Graphs [PDF]
The Open Biotechnology Journal, 2014 The vertex PI index and Szeged index are distance-based topological index which reflect certain structural features of organic molecules. Each structural feature of such organic molecule can be expressed as a graph. In this paper, we determine the vertex PI index and Szeged index of fan molecular graph, wheel molecular graph, gear fan molecular graph ...
Li Yan, Junsheng Li, Wei Gao
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On Weighted PI Index of Graphs
Electronic Notes in Discrete Mathematics, 2016 Abstract The vertex PI index of a graph G, denoted by P I v ( G ) , is the sum over all edges uv of G of the number of vertices which are not equidistant from u and v. Similarly, the Weighted PI index of a graph G, denoted by P I w ( G ) = ∑ u v = e ∈ E ( G ) ( d G ( u ) + d G ( v
K. Pattabiraman, P. Kandan
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The PI Index of polyomino chains
Applied Mathematics Letters, 2008 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Xu, Lixing, Chen, Shubo
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The PI index of product graphs
Applied Mathematics Letters, 2008 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Yousefi-Azari, H. +2 more
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Computation of edge Pi index, vertex Pi index and Szeged index of some cactus chains
Mathematica Montisnigri, 2022 A cactus chain is a connected graph in which all blocks are cycles, each cycle has at most two cut-vertices and each cut-vertex is shared by exactly two cycles. In this paper we give exact values of edge PI index and vertex PI index of an arbitrary cactus chain and vertex Szeged index of some special types of cactus chains.
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Population dynamics of Meloidogyne incognita on cucumber grafted onto the Cucurbita hybrid RS841 or ungrafted and yield losses under protected cultivation [PDF]
, 2017 The influence of the squash hybrid RS841 rootstock (Cucurbita maxima x C. moschata) on population dynamics of Meloidogyne incognita and yield of cucumber cv. Dasher II was assessed during 2013 and 2014 in a plastic greenhouse.
Giné, Ariadna +3 more
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Joint single-cell DNA accessibility and protein epitope profiling reveals environmental regulation of epigenomic heterogeneity. [PDF]
, 2018 Here we introduce Protein-indexed Assay of Transposase Accessible Chromatin with sequencing (Pi-ATAC) that combines single-cell chromatin and proteomic profiling. In conjunction with DNA transposition, the levels of multiple cell surface or intracellular
Chang, Howard Y +8 more
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Would it be possible to increase the Hirsch-index, pi-index or CDS-index by increasing the number of publications or citations only by unity? [PDF]
, 2013 The aim of the study is to explore the effects of the increase in the number of publications or citations on several impact indicators by a single journal paper or citation. The possible change of the h-index, A-index, R-index, pi-index, pi-rate, Journal
Aksnes +28 more
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Bounds on the weighted vertex PI index of cacti graphs
Filomat, 2019 The weighted vertex PI index of a graph G is defined by PIw(G)=?e=uv?E(G) (dG(u)+dG(v))(nu(e|G) + nv(e|G)) where dG(u) denotes the vertex degree of u and nu(e|G) denotes the number of vertices in G whose distance to the vertex u is smaller than the ...
Gang Ma, Qiuju Bian, Jianfeng Wang
semanticscholar +1 more source