Results 261 to 270 of about 188,725,496 (291)

On a variational localization of wannier functions

physica status solidi (b), 1973
AbstractA new variational localization of the Wannier functions is proposed and the corresponding equation for fixing the free phase of Bloch functions is derived for the case of non‐degenerate bands. The new equation is shown to be equivalent to a modification of the equations given by des Cloizeaux.
M. Kertész, G. Biczó
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Functionals of Bounded Frechet Variation

Canadian Journal of Mathematics, 1949
In a series of papers which will follow this paper the authors will present a theory of functionals which are bilinear over a product A × B of two normed vector spaces A and B. This theory will include a representation theory, a variational theory, and a spectral theory.
Morse, Marston, Transue, William
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ON FUNCTIONS OF GENERALIZED BOUNDED VARIATION

Mathematics of the USSR-Izvestiya, 1983
The following theorem by F. and M. Riesz is well known: If \(\Phi\) and its conjugate \({\tilde \Phi}\) are functions of bounded variation then \(\Phi\) and \({\tilde \Phi}\) are absolutely continuous. The author obtains the following generalization of this theorem. Theorem.
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Variational Subdifferential for Quasiconvex Functions

Journal of Optimization Theory and Applications, 2001
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Circadian variation in airway function

The American Journal of Medicine, 1985
Nocturnal asthma is a common and troublesome problem. Many possible mechanisms have been proposed, including exposure to allergens, sleep itself, the supine posture, withdrawal of bronchodilator drugs, gastric reflux, mucus plugging, and airway cooling.
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ON FUNCTIONS OF BOUNDED $ p$-VARIATION

Mathematics of the USSR-Izvestiya, 1968
In this article we obtain an asymptotic formula for the approximations to functions in the class (, ) by Fourier sums in the metric of (). We find sufficient conditions and also criteria for the continuity of the derivative of a function in the class . We also give some results on the Fourier coefficients of functions in the above class.
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VARIATIONAL PROBLEMS OF CERTAIN FUNCTIONALS

International Journal of Mathematics, 1995
We get the existence and regularity of minimizers of certain functionals, which may be degenerate and have non-polynomial growth. Applying these results we can find exponentially harmonic maps in every homotopy class of maps from a connected Riemannian C4-manifold into [Formula: see text], where [Formula: see text] is a compact Riemannian C4-manifold.
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Syntonicity of functions and the variation functional

Rendiconti del Circolo Matematico di Palermo, 1959
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Refinement of the Estimate for the Rate of Uniform Convergence of the Fourier Series of a Continuous Periodic Function of Bounded Variation

Mathematical Notes, 2023
T Yu Semenova
exaly  

A variational method for Grunsky functions

1983
Let \(\tilde G\) denote the class of functions of the form \(f(z)=\sum^{\infty}_{n=1}a_ nz^ n\) analytic in the unit disc D\(=\{z: | z|
Fait, Maria, Złotkiewicz, Eligiusz
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