Results 11 to 20 of about 547,161 (285)
ON GOOD APPROXIMATIONS AND THE BOWEN–SERIES EXPANSION [PDF]
Bulletin of the Australian Mathematical Society, 2021 AbstractWe consider the continued fraction expansion of real numbers under the action of a nonuniform lattice in $\text {PSL}(2,{\mathbb R})$ and prove metric relations between the convergents and a natural geometric notion of good approximations.
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Dynamic Model for LES Without Test Filtering: Quantifying the Accuracy of Taylor Series Approximations [PDF]
, 2001 The dynamic model for large-eddy simulation (LES) of turbulent flows requires test filtering the resolved velocity fields in order to determine model coefficients.
Charlette, Fabrice +2 more
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On Approximating DSGE Models by Series Expansions [PDF]
SSRN Electronic Journal, 2010 We show how to use a simple perturbation method to solve non-linear rational expectation models. Drawing from the applied mathematics literature we propose a method consisting of series expansions of the non-linear system around a known solution. The variables are represented in terms of their orders of approximation with respect to a perturbation ...
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Random spherical hyperbolic diffusion [PDF]
, 2019 The paper starts by giving a motivation for this research and justifying the considered stochastic diffusion models for cosmic microwave background radiation studies.
Broadbridge, Phil +3 more
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Approximation of the Nonlinear B-H Curve by Complex Exponential Series
IEEE Access, 2020 The paper presents an accurate and simple method for the approximation of the nonlinear B-H curves using expansion into complex exponential series. The least-squares fit of the model is obtained by the application of the Moore-Penrose pseudoinverse.
Martin Dadic +2 more
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On imploding cylindrical and spherical shock waves in a perfect gas [PDF]
, 2006 The problem of a cylindrically or spherically imploding and reflecting shock wave in a flow initially at rest is studied without the use of the strong-shock approximation.
Hornung, H. G. +3 more
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A Closed-Form Approximation of Likelihood Functions for Discretely Sampled Diffusions: the Exponent Expansion [PDF]
, 2006 In this paper we discuss a closed-form approximation of the likelihood functions of an arbitrary diffusion process. The approximation is based on an exponential ansatz of the transition probability for a finite time step $\Delta t$, and a series ...
Capriotti, Luca
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Topological Expansion and Exponential Asymptotics in 1D Quantum Mechanics [PDF]
, 1999 Borel summable semiclassical expansions in 1D quantum mechanics are considered. These are the Borel summable expansions of fundamental solutions and of quantities constructed with their help.
Balian R +29 more
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The Quantum Adiabatic Approximation and the Geometric Phase [PDF]
, 1996 A precise definition of an adiabaticity parameter $\nu$ of a time-dependent Hamiltonian is proposed. A variation of the time-dependent perturbation theory is presented which yields a series expansion of the evolution operator $U(\tau)=\sum_\ell U^{(\ell)}
A. Joye +24 more
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Open Mathematics, 2022 In this article, an effective finite element method based on dimension reduction scheme is proposed for a fourth-order Steklov eigenvalue problem in a circular domain.
Zhang Hui, Liu Zixin, Zhang Jun
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