Results 141 to 150 of about 576,868 (362)
Construction of an A-manifold on a principal torus bundle
, 2012 We construct a new example of an A-manifold, i.e. a Riemannian manifold with a cyclic-parallel Ricci tensor, which can be viewed as a generalization of the Einstein condition.
Zborowski, Grzegorz
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Propagation Equations of Electric and Magnetic Parts of Weyl Tensor in Einstein-Cartan Theory [PDF]
, 2007 L N Katkar, A S Patil
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Scalar field as a perfect fluid: thermodynamics of minimally coupled scalars and Einstein frame scalar-tensor gravity [PDF]
, 2023 Valerio Faraoni +3 more
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International Journal for Numerical Methods in Fluids, EarlyView.This paper presents a finite element method for simulating highly viscoelastic flows of pure polymer melts using the Elastic Viscous Stress Splitting formulation. The method avoids higher‐order derivatives in the weak formulation by reformulating the convective term in the constitutive equation.
R. Ahmad, P. Zajac, S. Turek
wiley +1 more source
Isolation of the Weyl conformal tensor for Einstein manifolds
Proceedings of the Japan Academy, Series A, Mathematical Sciences, 2002 The authors give a generalization of the isolation theorem of \textit{M. A. Singer} [ Differ. Geom. Appl. 2, 269--274 (1992; Zbl 0741.53035)]. More exactly, they prove that the Weyl conformal tensor of an oriented positive Ricci Einstein \(n\)-manifold (\(n\geq 4\)) obeys the following isolation theorem. Theorem.
Itoh, Mitsuhiro, Satoh, Hiroyasu
openaire +3 more sources
Negative Capability and Entrepreneurial Action
Strategic Change, EarlyView.ABSTRACT Entrepreneurs operate in environments marked by uncertainty. Existing theories of entrepreneurial action largely emphasize an entrepreneur's ability to make judgments and take decisive action despite ongoing uncertainty—competencies primarily supported by what we term positive capability (PC).
Jasper Brinkerink
wiley +1 more source
Relativistic segnificance of curvature tensors
International Journal of Mathematics and Mathematical Sciences, 1982 In thi paper new curvature tensors have been defined on the lines of Weyl's projective curvature tensor and it has been shown that the distribution (order in which the vectors in question are arranged before being acted upon by the tensor in question ...
G. P. Pokhariyal
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A tensor formalism for multilayer network centrality measures using the Einstein product
, 2023 Smahane El-Halouy +2 more
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Molecular Dynamics Study of Melt Structure and Transport Properties of Mg‒Al Alloy
Materials Genome Engineering Advances, EarlyView.The structural evolution and transport coefficients of the Mg‐Al alloy melt at different temperatures were investigated using molecular dynamics simulation methods. By establishing relationships among structure, diffusion, and viscosity, the microscopic mechanisms behind the temperature‐induced changes in transport properties are revealed. ABSTRACT The
Lijun Zhang +7 more
wiley +1 more source
Stochastic Gravity: Theory and Applications
Living Reviews in Relativity, 2004 Whereas semiclassical gravity is based on the semiclassical Einstein equation with sources given by the expectation value of the stress-energy tensor of quantum fields, stochastic semiclassical gravity is based on the Einstein-Langevin equation, which ...
Hu Bei Lok, Verdaguer Enric
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