Jacques Gélinas on Mon, 22 Oct 2018 06:07:38 +0200 |
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RE: References for Numerical Integration |
> Any other references would also be appreciated. Kevin 1. The example intnum(x=0,oo, (sin(x)^4)/(x)^2) is a Fourier Sine Transform of an oscillating function, sin^3(x)/x^2. It could be possible to get an infinite series for it with oscillating and decreasing terms, and then perhaps use Euler acceleration ? 2. Philip Davis+Philip Rabinowitz,, Methods of numerical integration (1984, p. 240) show how evaluate the Fourier Sine Transform of sin^2(x/2)/x i.e. intnum(x=0,oo, sin(x/2)^2/x sin(wx) ) for w=1 (Pi/8), w=10 (0), interpolating by subintervals and integrating the resulting formulas to get 4 correct digits. 3. Piessens+al, Quadpack. A subroutine package for automatic integration, Springer, 1983. Subroutine QAWFE (adaptative) http://www.netlib.org/quadpack/index.html Hope this helps, Jacques Gélinas