best uniform rational approximation
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31—40 of 235 matching pages
31: Bibliography C
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Uniform asymptotic expansion of an integral with a saddle point, a pole and a branch point.
Proc. Roy. Soc. London Ser. A 426, pp. 273–286.
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Special polynomials associated with rational solutions of the fifth Painlevé equation.
J. Comput. Appl. Math. 178 (1-2), pp. 111–129.
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Rational Chebyshev approximations for the exponential integral
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Math. Comp. 22 (103), pp. 641–649.
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Rational Chebyshev approximations for the error function.
Math. Comp. 23 (107), pp. 631–637.
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A survey of practical rational and polynomial approximation of functions.
SIAM Rev. 12 (3), pp. 400–423.
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32: 18.16 Zeros
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Asymptotic Behavior
… ►The constant in (18.16.10) is the best possible since the ratio of the two sides of this inequality tends to 1 as . … ►For an error bound for the first approximation yielded by this expansion see Olver (1997b, p. 408). ►Lastly, in view of (18.7.19) and (18.7.20), results for the zeros of lead immediately to results for the zeros of . …33: 9.19 Approximations
§9.19 Approximations
►§9.19(i) Approximations in Terms of Elementary Functions
… ►Moshier (1989, §6.14) provides minimax rational approximations for calculating , , , . They are in terms of the variable , where when is positive, when is negative, and when . The approximations apply when , that is, when or . The precision in the coefficients is 21S.
§9.19(ii) Expansions in Chebyshev Series
… ►§9.19(iii) Approximations in the Complex Plane
…34: Bibliography K
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Determinant structure of the rational solutions for the Painlevé II equation.
J. Math. Phys. 37 (9), pp. 4693–4704.
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Determinant structure of the rational solutions for the Painlevé IV equation.
J. Phys. A 31 (10), pp. 2431–2446.
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Uniform asymptotic approximations for the Meixner-Sobolev polynomials.
Anal. Appl. (Singap.) 10 (3), pp. 345–361.
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Exponentially accurate uniform asymptotic approximations for integrals and Bleistein’s method revisited.
Proc. R. Soc. Lond. Ser. A Math. Phys. Eng. Sci. 469 (2153), pp. 20130008, 12.
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Rational solutions of the fifth Painlevé equation.
Differential Integral Equations 7 (3-4), pp. 967–1000.
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35: 36.15 Methods of Computation
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►Close to the bifurcation set but far from , the uniform asymptotic approximations of §36.12 can be used.
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►This can be carried out by direct numerical evaluation of canonical integrals along a finite segment of the real axis including all real critical points of , with contributions from the contour outside this range approximated by the first terms of an asymptotic series associated with the endpoints.
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36: Annie A. M. Cuyt
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►Her main research interest is in the area of numerical approximation theory and its applications to a diversity of problems in scientific computing.
…A lot of her research has been devoted to rational approximations, in one as well as in many variables, and sparse interpolation.
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37: 2.11 Remainder Terms; Stokes Phenomenon
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§2.11(iii) Exponentially-Improved Expansions
… ►One is uniformly valid for with bounded , and achieves uniform exponential improvement throughout : … ►In addition to achieving uniform exponential improvement, particularly in for , and for , the re-expansions (2.11.20), (2.11.21) are resurgent. … ►§2.11(vi) Direct Numerical Transformations
…38: 13.22 Zeros
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►Asymptotic approximations to the zeros when the parameters and/or are large can be found by reversion of the uniform approximations provided in §§13.20 and 13.21.
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39: Bibliography M
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Rational approximations, software and test methods for sine and cosine integrals.
Numer. Algorithms 12 (3-4), pp. 259–272.
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New ladder operators for a rational extension of the harmonic oscillator and superintegrability of some two-dimensional systems.
J. Math. Phys. 54 (10), pp. Paper 102102, 12 pp..
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A determinant formula for a class of rational solutions of Painlevé V equation.
Nagoya Math. J. 168, pp. 1–25.
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Uniform computation of the error function and other related functions.
Math. Comp. 25 (114), pp. 339–344.
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Rational solutions of the Painlevé VI equation.
J. Phys. A 34 (11), pp. 2281–2294.
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40: Bibliography D
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Uniform asymptotic expansions for prolate spheroidal functions with large parameters.
SIAM J. Math. Anal. 17 (6), pp. 1495–1524.
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Uniform asymptotic approximation of Mathieu functions.
Methods Appl. Anal. 1 (2), pp. 143–168.
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Uniform asymptotic expansions for Charlier polynomials.
J. Approx. Theory 112 (1), pp. 93–133.
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Uniform asymptotic approximations for the Whittaker functions and
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Anal. Appl. (Singap.) 1 (2), pp. 199–212.
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Uniform asymptotic approximations for incomplete Riemann zeta functions.
J. Comput. Appl. Math. 190 (1-2), pp. 339–353.
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