Fast computation of Goursat's infinite integral with very high accuracy
Fast computation of Goursat's infinite integral with very high accuracy
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以非常高的精度快速计算 Goursat 的无限积分
DOI:
10.1016/j.cam.2013.02.006
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发表时间:
2013
期刊:
影响因子:
--
通讯作者:
T. Ooura
中科院分区:
文献类型:
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作者:
榊原航也;矢崎成俊;中村 健一;石渡 哲哉;Tetsuya Ishiwata;Koya Sakakibara and Shigetoshi Yazaki;Toshiko Ogiwara;Ken-Ichi Nakamura;Ken-Ichi Nakamura;Shigetoshi Yazaki;Tetsuya Ishiwata;石渡 哲哉;Toshiko Ogiwara;荻原 俊子;Ken-Ichi Nakamura;Ken-Ichi Nakamura;Ken-Ichi Nakamura;Shigetoshi Yazaki;Tetsuya Ishiwata;T. Ooura
We propose an efficient computation method for the infinite integral ∫0∞xdx/(1+x6sin2x), whose integrand contains a series of spikes, approximately π apart, growing taller and narrower as x increases. Computing the value of this integral has been a problem since 1984. We herein demonstrate a method using the Hilbert transform for changing this type of singular function into a smooth function and computing the value of the integral to more than one million significant digits using a superconvergent double exponential quadrature method.