Results 11 to 20 of about 286,272 (200)
On the order of approximation in approximative triadic decompositions of tensors
Theoretical Computer Science, 1989 Based on \textit{A. Alder's} result [Grenzrang und Grenzkomplexität aus algebraischer und topologischer Sicht, Dissertation, Univ. Zürich (1984)] on the equivalence of algebraic and topological border rank of tensors t over algebraically closed ground fields k, the author gives an upper bound for the order of approximation in approximative triadic ...
Thomas Lehmkuhl, Thomas Lickteig
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International Journal of Mathematics and Mathematical Sciences, 1994 We continue the investigation initiated by Mastroianni and Szabados on question whether Jackson's order of approximation can be attained by Lagrange interpolation for a wide class of functions.
Xin Li
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Approximation order and approximate sum rules in subdivision
Journal of Approximation Theory, 2016 Several properties of stationary subdivision schemes are nowadays well understood. In particular, it is known that the polynomial generation and reproduction capability of a stationary subdivision scheme is strongly connected with sum rules, its convergence, smoothness and approximation order.
CONTI, COSTANZA +2 more
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Approximate Derivations of Order n [PDF]
Acta Mathematica Hungarica, 2014 The aim of this paper is to prove characterization theorems for higher order derivations. Among others we prove that the system defining higher order derivations is stable. Further characterization theorems in the spirit of N.~G.~de Bruijn will also be presented.
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On Local and Controlled Approximation Order
Journal of Approximation Theory, 1993 The authors deal with approximations to smooth functions by objects which are essentially discrete convolutions. The purpose is to get error estimates for approximation power of dilates of these convolutions in terms of the dilation parameter \(h\).
Halton, E.J., Light, W.A.
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Finite-difference method for solving Tricomi problem for the Lavrent’ev-Bitsadze equation
Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2017 In this paper we obtain an a priori estimate for solution of Tricomi problem for the Lavrent’ev-Bitsadze equation, from which the uniqueness of regular solution follows. Presented a numerical finite-difference method for solving the investigated problem.
Giraslan A Balkizov, Aslan A Sokurov
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Approximation of Fractional Order PIλDμ-Controller Transfer Function Using Chain Fractions
Energies, 2022 The approximation of a fractional order PIλDμ-controller transfer function using a chain fraction theory is considered. Analytical expressions for the approximation of s±α components of the transfer functions of PIλDμ-controllers were obtained through ...
Yaroslav Marushchak +5 more
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Non-Integer Order Approximation of a PID-Type Controller for Boost Converters
Energies, 2021 In this work, the voltage regulation of a boost converter is addressed. A non-integer order PID controller is proposed to deal with the closed-loop instability of the system.
Allan G. S. Sánchez +3 more
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Approximation Properties for Orderings on ∗ -Fields [PDF]
Transactions of the American Mathematical Society, 1988 The goal of this paper is to extend the main theorems on approximation properties of the topological space of orderings from formally real fields to skew fields with an involution
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Hamiltonian Perturbations at the Second-Order Approximation [PDF]
Annales Henri Poincaré, 2020 Integrability condition of Hamiltonian perturbations of integrable Hamiltonian PDEs of hydrodynamic type up to the second order approximation is considered.
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