Numerical approximations of Bessel functions are both of important theoretical significance and widely applied in mathematics, physics, engineering. In this work, we apply two variants of Prony's method on Bessel functions of the first kind of integer order. The Prony-like methods in cosine or sine version yield approximations as sums of sinusoidal functions of Bessel functions of the first kind of integer order. In the symbolic computation software Maple, we compute the approximations for different orders and over different intervals, and compare these approximations with those obtained through the Fourier method. Experiments show that Prony-like methods perform much better than the Fourier method.
JI Yu
,
HE Yi-xuan
,
WU Guo-qun
,
WU Min
. On evaluation of Bessel functions of the first kind via Prony-like methods[J]. Journal of East China Normal University(Natural Science), 2019
, 2019(6)
: 42
-60
.
DOI: 10.3969/j.issn.1000-5641.2019.06.006
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