The Voigt and complex error function: Humlíček’s rational approximation generalized
The Voigt and complex error function: Humlíček’s rational approximation generalized
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Voigt 和复误差函数:Humläek 的有理逼近广义化
DOI:
10.1093/mnras/sty1680
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发表时间:
2018
影响因子:
4.8
通讯作者:
F. Schreier
中科院分区:
文献类型:
--
作者:
F. Schreier
Accurate yet efficient computation of the Voigt and complex error function is a challenge since decades in astrophysics and other areas of physics. Rational approximations have attracted considerable attention and are used in many codes, often in combination with other techniques. The 12-term code ‘cpf12’ of Humlíček achieves an accuracy of five to six significant digits throughout the entire complex plane. Here we generalize this algorithm to a larger (even) number of terms. Then= 16 approximation has a relative accuracy better than 10−5for almost the entire complex plane except for very small imaginary values of the argument even without the correction term required for thecpf12algorithm. With 20 terms the accuracy is better than 10−6. In addition to the accuracy assessment we discuss methods for optimization and propose a combination of the 16-term approximation with the asymptotic approximation of the w4 code of Humlíček for high efficiency.
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DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
Pascal Molin
通讯作者:
Pascal Molin
DOI:
10.1111/j.1365-2966.2012.21440.x
发表时间:
2012
影响因子:
4.8
作者:
J. Tennyson;S. Yurchenko
通讯作者:
S. Yurchenko
影响因子:
6.5
作者:
H. Nordh;F. Schéele;U. Frisk;K. Ahola;R. Booth;P. Encrenaz;Å. Hjalmarson;D. Kendall;E. Kyrölä;S. Kwok;A. Lecacheux;G. Leppelmeier;E. Llewellyn;K. Mattila;G. Mégie;D. Murtagh;M. Rougeron;G. Witt
通讯作者:
G. Witt
DOI:
10.1145/77626.77630
发表时间:
1990-03
期刊:
ACM Trans. Math. Softw.
影响因子:
--
作者:
G. Poppe;C. Wijers
通讯作者:
G. Poppe;C. Wijers
影响因子:
6.5
作者:
K. Heng
通讯作者:
K. Heng