Results 131 to 140 of about 4,590 (301)
Bilinear Bäcklund transformation, Lax pair and multi-soliton solution for a vector Ramani equation
, 2017 In this paper, a vector Ramani equation is proposed by using the bilinear approach. With the help of the bilinear exchange formulae, bilinear Bäcklund transformation and the corresponding Lax pair for the vector Ramani equation are derived.
Junchao Chen, Bao-Feng Feng, Yong Chen
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Nordic Journal of Botany, EarlyView.The new species Barleria kulalensis I.Darbysh. & Q.Luke and Dicliptera huriensis I.Darbysh. & Q.Luke are described and illustrated and their extinction risk is assessed provisionally. The former is based on Barleria sp. G of the Flora of Tropical East Africa (FTEA), with recent field observation and collection of this species from the foothills of ...
Iain Darbyshire, Quentin Luke
wiley +1 more source
Discrete Dynamics in Nature and Society, 2018 An integrable family of the different-difference equations is derived from a discrete matrix spectral problem by the discrete zero curvature representation. Hamiltonian structure of obtained integrable family is established.
Xi-Xiang Xu, Meng Xu
doaj +1 more source
Novelty for the flora of Espírito Santo, Brazil: a new species of Ouratea Aubl. (Ochnaceae)
Nordic Journal of Botany, EarlyView.Here, we describe and illustrate the new species Ouratea oberdanii Fraga & Deccache, which is named after Dr Oberdan José Pereira. This new species is found in the mountainous regions of the evergreen Atlantic Forest in the Brazilian state of Espírito Santo. Ouratea oberdanii is similar to O. linearis (A.Gray) Sastre & Offroy and O.
Lara Serpa Jaegge Deccache +4 more
wiley +1 more source
A Method for Constructing a Lax Pair for the Ernst Equation
, 2009 A systematic construction of a Lax pair and an infinite set of conservation laws for the Ernst equation is described. The matrix form of this equation is rewritten as a differential ideal of gl(2,R)-valued differential forms, and its symmetry condition ...
Papachristou, C. J. +3 more
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Sustainable Development, EarlyView.ABSTRACT The fifth industrial revolution (I5.0), which is based on the utilization of interconnected data for efficient resource usage in meeting human requirements, proposes efficient solutions to resource constraint situations. However, the transition to I5.0 in the health sector is not easy and has to face several obstacles.
Ajay Jha +5 more
wiley +1 more source
, 2007 We consider a difference-difference Davey-Stewartson system together with its bilinear structure. We write some new Gram-type determinantal solutions taking into account a set of Jacobi identities for determinants.
Hu XB +3 more
core +1 more source
Does Productivity Growth Promote Environmental Sustainability? The Role of Financial Development
Sustainable Development, EarlyView.ABSTRACT This study investigates whether total factor productivity (TFP) promotes environmental sustainability and examines the moderating and mediating roles of financial development in shaping this relationship. Using balanced panel data for 92 countries from 2000 to 2023, the analysis employs dynamic two‐step Generalised Method of Moments (GMM ...
Olivier Joseph Abban
wiley +1 more source
Lax-type pairs in the theory of bivariate orthogonal polynomials
, 2023 Sequences of bivariate orthogonal polynomials written as vector polynomials of increasing size satisfy a couple of three term relations with matrix coefficients.
Pérez, Teresa E. +3 more
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AI Vibrancy and Renewable Energy Consumption: A Cross‐Country Analysis
Sustainable Development, EarlyView.ABSTRACT This study examines the association between artificial intelligence vibrancy and renewable energy consumption across 36 countries from 2017 to 2023. Using a reduced‐form panel framework with Driscoll–Kraay standard errors, the results show that income per capita and government effectiveness are the dominant drivers of renewable energy ...
Leping Huang +3 more
wiley +1 more source