Results 31 to 40 of about 574,412 (205)
Weighted rational approximation in the complex plane
Journal de Mathématiques Pures et Appliquées, 1999 Given a domain \(G\subset\mathbb{C}\), \(f\) analytic in \(G\), a weight function \(W\) also analytic in \(G\) and \(W(z)\neq 0\) in \(G\), and \(\gamma\) with \(0\leq\gamma\leq 1\), the authors study the rational approximation property of \(W\): There exist rational functions \(R_i=P_{m_i}/Q_{n_i}\) where \(P,Q\) are polynomials of degree \(\leq m_i\)
Pritsker, I.E., Varga, R.S.
openaire +2 more sources
The aproximation of functions in generalized Holder spaces [PDF]
Computer Science Journal of Moldova, 1996 The theorems of approximation of complex functions determined on the closed arbitrary contour Г of the complex plane by means of Lagrange interpolating polynomials in generalized Holder spaces Hw were obtained.
V. Zolotarevski, G. Andriesh
doaj
A Critical Examination to the Unitarized $\pi\pi$ Scattering Chiral Amplitudes [PDF]
, 2001 We discuss the Pad\'e approximation to the $\pi\pi$ scattering amplitudes in 1--loop chiral perturbation theory. The approximation restores unitarity and can reproduce the correct resonance poles, but the approximation violates crossing symmetry and ...
Ang, Qin +3 more
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Spin Observables in Coincidence Electron Scattering from Nuclei I: Reduced Response Functions [PDF]
, 1998 A theoretical description of nucleon knockout reactions initiated by polarized electron scattering from polarized nuclei is presented. Explicit expressions for the complete set of reduced response functions (independent of the polarization angle) that ...
Amaro +20 more
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Complex approximation by real approximation [PDF]
مجلة جامعة الانبار للعلوم الصرفةIt is known that approximation of the complex functions does not, in general, depend on approximation of the real functions. However, if the complex function is viewed as a Cartesian product of two real functions, a relationship appears between the two ...
Jawad Judy
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Universal approximation theorem for Dirichlet series
International Journal of Mathematics and Mathematical Sciences, 2006 The paper deals with an extension theorem by Costakis and Vlachou on simultaneous approximation for holomorphic function to the setting of Dirichlet series, which are absolutely convergent in the right half of the complex plane.
O. Demanze, A. Mouze
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Approximation by proper holomorphic maps and tropical power series
, 2017 Let $w$ be an unbounded radial weight on the complex plane. We study the following approximation problem: find a proper holomorphic map $f: \mathbb{C}\to\mathbb{C}^n$ such that $|f|$ is equivalent to $w$.
Abakumov, Evgeny, Doubtsov, Evgueni
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Approximation by Zygmund means in variable exponent Lebesque spaces [PDF]
Mathematica Moravica, 2019 In the present work we investigate the approximation of the functions by the Zygmund means in variable exponent Lebesgue spaces. Here the estimate which is obtained depends on sequence of the best approximation in Lebesgue spaces with variable exponent ...
Jafarov Sadulla Z.
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Improved WKB approximation for quantum tunneling: Application to heavy ion fusion
, 2017 In this paper we revisit the one-dimensional tunneling problem. We consider Kemble's approximation for the transmission coefficient. We show how this approximation can be extended to above-barrier energies by performing the analytical continuation of the
Canto, L. F. +2 more
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Improved local-constant-field approximation for strong-field QED codes [PDF]
, 2019 The local-constant-field approximation (LCFA) is an essential theoretical tool for investigating strong-field QED phenomena in background electromagnetic fields with complex spacetime structure.
Di Piazza, A. +3 more
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