Results 11 to 20 of about 596,386 (281)
Bare Root Liner Production Can Alter Tree Root Architecture [PDF]
Journal of Environmental Horticulture, 2009 Abstract Typical nursery production practices, such as root pruning and transplanting, can alter tree root architecture and contribute to root systems that are too deep. In a study of field-grown liner production, root architecture was examined at each stage of the production process, from first year seedlings or rooted cuttings, through 4 to 5
Angela Hewitt, Gary Watson
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Bounds for the general sum-connectivity index of composite graphs
Journal of Inequalities and Applications, 2017 The general sum-connectivity index is a molecular descriptor defined as χ α ( X ) = ∑ x y ∈ E ( X ) ( d X ( x ) + d X ( y ) ) α $\chi_{\alpha}(X)=\sum_{xy\in E(X)}(d_{X}(x)+d_{X}(y))^{\alpha}$ , where d X ( x ) $d_{X}(x)$ denotes the degree of a vertex x
Shehnaz Akhter +2 more
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On the Additively Weighted Harary Index of Some Composite Graphs
Mathematics, 2017 The Harary index is defined as the sum of reciprocals of distances between all pairs of vertices of a connected graph. The additively weighted Harary index H A ( G ) is a modification of the Harary index in which the contributions of vertex ...
Behrooz Khosravi, Elnaz Ramezani
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Pluralismo giuridico e pratica giuridica indigena: il caso dei Guaranì del Chaco Boliviano
EtnoAntropologia, 2017 This article ethnographically explores the form and the content of juridical practices of Guarani people living in the Capitanías of Charagua Norte and Alto Isoso, Bolivia. Starting from the Bolivian legal pluralism main field and through the analysis of
Francesca Scionti
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On Metric Dimensions of Symmetric Graphs Obtained by Rooted Product
Mathematics, 2018 Let G = (V, E) be a connected graph and d(x, y) be the distance between the vertices x and y in G. A set of vertices W resolves a graph G if every vertex is uniquely determined by its vector of distances to the vertices in W.
Shahid Imran +3 more
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On Sackin’s original proposal: the variance of the leaves’ depths as a phylogenetic balance index
BMC Bioinformatics, 2020 Background The Sackin index S of a rooted phylogenetic tree, defined as the sum of its leaves’ depths, is one of the most popular balance indices in phylogenetics, and Sackin’s paper (Syst Zool 21:225–6, 1972) is usually cited as the source for this ...
Tomás M. Coronado +3 more
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Root Architecture and Plant Productivity [PDF]
Plant Physiology, 1995 Water and nutrient availability limit plant growth in a11 but a very few natural ecosystems. They limit yield in most agricultural ecosystems, and in the United States and other industrialized nations, intensive irrigation and fertilization have generated serious environmental problems.
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Combinatorial Hopf algebras from renormalization [PDF]
, 2009 In this paper we describe the right-sided combinatorial Hopf structure of three Hopf algebras appearing in the context of renormalization in quantum field theory: the non-commutative version of the Fa\`a di Bruno Hopf algebra, the non-commutative version
Alessandra Frabetti +15 more
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The Graphs Whose Permanental Polynomials Are Symmetric
Discussiones Mathematicae Graph Theory, 2018 The permanental polynomial π(G,x)=∑i=0nbixn−i$\pi (G,x) = \sum\nolimits_{i = 0}^n {b_i x^{n - i} }$ of a graph G is symmetric if bi = bn−i for each i. In this paper, we characterize the graphs with symmetric permanental polynomials.
Li Wei
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Mathematics, 2019 In this work, we study the degree-based topological invariants, and the general sum-connectivity, A B C 4 , G A 5 , general Zagreb, G A , generalized Randić, and A B C indices of the line graphs of some rooted product ...
Adnan Aslam +4 more
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