Zobrazeno 1 - 10
of 337
pro vyhledávání: '"P.G.L. Leach"'
Autor:
T.M. Agbaje, P.G.L. Leach
Publikováno v:
International Journal of Applied Mechanics and Engineering, Vol 26, Iss 1, Pp 1-17 (2021)
In this study, the spectral perturbation method and the spectral relaxation method are used to solve the nonlinear differential equations of an unsteady nonlinear MHD flow in the presence of thermal radiation and heat generation. The SPM is mainly ba
Externí odkaz:
https://doaj.org/article/250e582d440646c1b9e7900868d7cd10
Publikováno v:
Physics Letters B, Vol 755, Iss , Pp 8-12 (2016)
We discuss the application of the Hojman's Symmetry Approach for the determination of conservation laws in Cosmology, which has been recently applied by various authors in different cosmological models. We show that Hojman's method for regular Hamilt
Externí odkaz:
https://doaj.org/article/ab1ba39644444558a40f6d53495c38b4
Autor:
Sibusiso Moyo, P.G.L. Leach
Publikováno v:
Symmetry, Integrability and Geometry: Methods and Applications, Vol 1, p 024 (2005)
We study the symmetry properties of autonomous integrating factors from an algebraic point of view. The symmetries are delineated for the resulting integrals treated as equations and symmetries of the integrals treated as functions or configurational
Externí odkaz:
https://doaj.org/article/db3642ce82b641308ef579a92e1eddbf
Publikováno v:
Symmetry, Integrability and Geometry: Methods and Applications, Vol 1, p 018 (2005)
We investigate the symmetry properties of a pair of Ermakov equations. The system is superintegrable and yet possesses only three Lie point symmetries with the algebra sl(2, R). The number of point symmetries is insufficient and the algebra unsuitabl
Externí odkaz:
https://doaj.org/article/d469de17614e48b29318e31a303e7b2b
Publikováno v:
Mathematical Methods in the Applied Sciences. 45:10710-10717
We revise recent results on the classification of the generalized three-dimensional Hamiltonian Ermakov system. We show that a statement published recently is incorrect, while the solution for the classification problem was incomplete. We present the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1203a41b71c04613e4cfb948c225b7f2
https://doi.org/10.1002/mma.8413
https://doi.org/10.1002/mma.8413
Akademický článek
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Autor:
P.G.L. Leach, T.M. Agbaje
Publikováno v:
International Journal of Applied Mechanics and Engineering, Vol 26, Iss 1, Pp 1-17 (2021)
In this study, the spectral perturbation method and the spectral relaxation method are used to solve the nonlinear differential equations of an unsteady nonlinear MHD flow in the presence of thermal radiation and heat generation. The SPM is mainly ba
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c291fa410998cf0370df88839c734624
https://doaj.org/article/250e582d440646c1b9e7900868d7cd10
https://doaj.org/article/250e582d440646c1b9e7900868d7cd10
In the present article, we show that a simple modification to the Einstein-Hilbert action can explain the possibility of mutual interaction between the cosmic fluids. That is achieved considering the Weyl Integrable Spacetime in the background of a n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5b37ff9bb6bc9c6c3b44fbdb62615747
Akademický článek
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Autor:
P.G.L. Leach, Andronikos Paliathanasis
Publikováno v:
Quaestiones Mathematicae. 44:1-6
We consider the generalized Painleve-Ince equation, and we perform a detailed study in terms of symmetry analysis and of the singularity analysis. When the free parameters are related as β = α2/9 t...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::749c721252a6b7546d8901d8176ef0e8
https://doi.org/10.2989/16073606.2019.1655499
https://doi.org/10.2989/16073606.2019.1655499