Results 291 to 300 of about 292,354 (329)
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2004
In many cases stationary perturbation theory cannot be applied successfully as there may not be a closely related problem which is capable of exact solution.
S. Lokanathan, Ajoy Ghatak
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In many cases stationary perturbation theory cannot be applied successfully as there may not be a closely related problem which is capable of exact solution.
S. Lokanathan, Ajoy Ghatak
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On the Palatini method of variation
Journal of Mathematical Physics, 1978The Palatini method of variation is compared with the Hilbert method for symmetric metrics and affine connections. It is found that the two methods are in general inequivalent. The Hilbert method is recommended as being more general.
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The Schwinger Variation Method
Journal of the Society for Industrial and Applied Mathematics, 1964Abstract : The Schwinger variation method is removed from its customary setting in Green's function theory, and is approached from the integral equations viewpoint. The traditional Schwinger theory is improved upon in two respects. Error bounds are provided for the approximations to A(f), a function determining waveguide transmission and reflection ...
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Variational Methods of Approximation [PDF]
, 1976 In this chapter, we describe several of the more popular variational methods for the approximate solution of boundary-and initial-value problems. For ease in presentation, we confine our attention to linear problems, and most of what we present has to do with elliptic boundary-value problems. In particular, we discuss interpolation properties of finite
J. N. Reddy, J. T. Oden
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Variational transcorrelated method
The Journal of Chemical Physics, 2010We propose a new approach to the use of Jastrow ansatz in the calculation of electron correlations, based on a modification of the transcorrelated method of Boys and Handy [Proc. R. Soc. London, Ser. A 309, 209 (1969)]. In this new method, the original transcorrelated orbital equation is replaced with a general variational equation for the reference ...
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The variational collocation method
Computer Methods in Applied Mechanics and Engineering, 2016We propose the variational collocation method for the numerical solution of partial differential equations. The conceptual basis is the establishment of a direct connection between the Galerkin method and the classical collocation methods, with the perspective of achieving the accuracy of the former with a computational cost of one point evaluation per
Hector Gomez, Laura De Lorenzis
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The Variational and WKB Methods
1994More often than not, it is impossible to find exact solutions to the eigenvalue problem of the Hamiltonian. One then turns to approximation methods, some of which will be described in this and the following chapters. In this section we consider a few examples that illustrate the variational method.
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ON THE VARIATE DIFFERENCE METHOD [PDF]
Australian Journal of Statistics, 1963 J. N. K. Rao, G. Tintner
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Radiotheranostics in oncology: Making precision medicine possible
Ca-A Cancer Journal for Clinicians, 2023Eric Aboagye
exaly
Enhancing global access to cancer medicines
Ca-A Cancer Journal for Clinicians, 2020Javier Cortes +2 more
exaly