Results 51 to 60 of about 4,276,702 (282)
Searching closed form analytic solutions to some nonlinear fractional wave equations
Arab Journal of Basic and Applied Sciences, 2021 Numerous tangible incidents in physics, chemistry, applied mathematics and engineering are described successfully by means of models making use of the theory of derivatives of fractional order and research in this area has grown significantly.
Md. Tarikul Islam +2 more
doaj +1 more source
Total Mass-Momentum of Arbitrary Initial-Data Sets in General Relativity
, 1994 For an asymptotically flat initial-data set in general relativity, the total mass-momentum may be interpreted as a Hermitian quadratic form on the complex, two-dimensional vector space of ``asymptotic spinors''. We obtain a generalization to an arbitrary
Geroch, Robert, Perng, Shyan-Ming
core +1 more source
Dirac brackets from magnetic backgrounds [PDF]
, 2006 In symplectic mechanics, the magnetic term describing the interaction between a charged particle and an external magnetic field has to be introduced by hand.
Connes A. +8 more
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Kaehler Submanifolds of Complex Space Forms
Tokyo Journal of Mathematics, 1987 Under the notion ``diastasis'' introduced by \textit{E. Calabi} [Ann. Math., II. Ser. 58, 1-23 (1953; Zbl 0051.131)] the author proves the following theorem: Any two complex space forms of different types have no Kaehler submanifold in common, that is, (1) a Kaehler submanifold of \({\mathbb{C}}^ N\) cannot be a Kaehler submanifold of any complex ...
openaire +3 more sources
Characterization of Holomorphic Bisectional Curvature of GCR-Lightlike Submanifolds
Advances in Mathematical Physics, 2012 We obtain the expressions for sectional curvature, holomorphic sectional curvature, and holomorphic bisectional curvature of a GCR-lightlike submanifold of an indefinite Kaehler manifold.
Sangeet Kumar +2 more
doaj +1 more source
Therapeutic Apheresis and Dialysis, EarlyView.ABSTRACT Objective To compare the efficacy and safety of roxarestat versus recombinant human erythropoietin (rhEPO) in the management of renal anemia in patients undergoing maintenance hemodialysis. Methods This was a prospective, open‐label, randomized controlled trial.
Lingling Chen, Junjie Zhu, Qiaonan Ge
wiley +1 more source
Therapeutic Apheresis and Dialysis, EarlyView.ABSTRACT Introduction Pre‐dilution online hemodiafiltration (Pre‐HDF) is predominantly used in Japan, whereas post‐dilution online HDF (Post‐HDF) is more common in Europe. An asymmetric cellulose triacetate (ATA) membrane may improve biocompatibility.
Kenji Sakurai +4 more
wiley +1 more source
Almost Complex Surfaces in the Nearly Kähler SL(2,ℝ) × SL(2,ℝ)
Mathematics, 2020 The space S L ( 2 , R ) × S L ( 2 , R ) admits a natural homogeneous pseudo-Riemannian nearly Kähler structure. We investigate almost complex surfaces in this space.
Elsa Ghandour, Luc Vrancken
doaj +1 more source
Beta diversity of plant-pollinator networks and the spatial turnover of pairwise interactions. [PDF]
PLoS ONE, 2014 Interactions between species form complex networks that vary across space and time. Even without spatial or temporal constraints mutualistic pairwise interactions may vary, or rewire, across space but this variability is not well understood.
Daniel W Carstensen +3 more
doaj +1 more source
Complete Calabi-Yau metrics from Kahler metrics in D=4
, 2010 In the present work the local form of certain Calabi-Yau metrics possessing a local Hamiltonian Killing vector is described in terms of a single non linear equation. The main assumptions are that the complex $(3,0)$-form is of the form $e^{ik}\widetilde{\
A. Besse +12 more
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