Results 31 to 40 of about 11,753 (303)
Energies, 2022 This paper proposes a rational approximation-based approach to find positive real parameters for the extended Debye model (EDM), aimed at condition assessment of insulation systems of power transformers.
Giovanni Hernandez, Abner Ramirez
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Researches in MathematicsThe paper considers the classical problem of the rational approximation of analytic functions of complex variable, in particulary, to issues that arise when constructing branched continued fraction expansions for generalized hypergeometric functions ...
Y. Lutsiv +3 more
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PLoS ONE, 2023 Support vector machine (SVM) is a new machine learning method developed from statistical learning theory. Since the objective function of the unconstrained SVM model is a non-smooth function, a lot of fast optimization algorithms can't be used to find ...
Jianjian Wang, Feng He, Shouheng Sun
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Algorithms and error bounds for multivariate piecewise constant approximation
, 2010 We review the surprisingly rich theory of approximation of functions of many vari- ables by piecewise constants. This covers for example the Sobolev-Poincar´e inequalities, parts of the theory of nonlinear approximation, Haar wavelets and tree ...
Oleg Davydov, Davydov, Oleg
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The Investigation of the Discrete Universality of L-Functions of Elliptic Curves
Jaunųjų Mokslininkų Darbai, 2022 In the paper, we prove the discrete universality theorem in the sense of the weak convergence of probability measures in the space of analytic functions for the L-functions of elliptic curves.
Samanta Zakaitė, Antanas Garbaliauskas
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Orthogonal rational functions and modified approximants [PDF]
Numerical Algorithms, 1996 This paper studies certain rational approximants to the function \[ F_\mu(z)= \int^\pi_{- \pi} {t+ z\over t- z} d\mu(\theta),\quad(t= e^{i\theta}), \] where \(\mu\) is a positive Borel measure on the unit circle in the complex plane. These approximants are constructed in terms of orthogonal rational functions with fixed poles. In fact, given a sequence
Bultheel, A. +3 more
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Package Macromodeling via Time-Domain Vector Fitting [PDF]
, 2003 —This paper addresses the construction of lumped macromodels for package structures. A technique named Time-Domain Vector Fitting (TD-VF) is introduced for the identification of the dominant poles of the structure.
S. Grivet-talocia +2 more
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Analytic approximate eigenvalues by a new technique. Application to sextic anharmonic potentials
Results in Physics, 2018 A new technique to obtain analytic approximant for eigenvalues is presented here by a simultaneous use of power series and asymptotic expansions is presented.
D. Diaz Almeida, P. Martin
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On Best Approximation By Rational And Holomorphic Mappings Between Banach Spaces
, 2015 After proving a generalized version of Garkavi's theorem, we give as applications proofs of existence results on best approximation by polynomials, and fractional linear and holomorphic operators between Banach spaces.
Roversi M.S.M. +5 more
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Математичні СтудіїContinued fractions and their generalization, branched continued fractions, are the effective tools used to study special functions. In this aspect, an important problem of continued fractions and branched continued fractions is the study of their ...
M. V. Dmytryshyn +3 more
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