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Matt Pitkin edited Equation_ref_eq_fourier3_is__.tex
over 8 years ago
Commit id: 961556e42fb117b89b814da6ed285a84fd109c7f
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diff --git a/Equation_ref_eq_fourier3_is__.tex b/Equation_ref_eq_fourier3_is__.tex
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--- a/Equation_ref_eq_fourier3_is__.tex
+++ b/Equation_ref_eq_fourier3_is__.tex
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Equation~\ref{eq:fourier3} is potentially \href{http://math.stackexchange.com/a/1470809/95147}{soluble} analytically using incomplete Bessel functions and hypergeometric equations. However, it may be easier to create a lookup table of numerical solutions in $z$ and $\alpha$ space. First, it may also be better to split the integral into the real and imaginary parts to solve each individually. So, we have
\begin{align}
H_k(f)
=& = y_k\left(\frac{\pi}{3}\ddot{f_k}\right)^{-1/3}e^{i\left(\phi_k-\pi f \Delta t + \beta
\right)}\Bigg[\int_{0}^{z_2} \right)}&\Bigg[\int_{0}^{z_2} \cos{\left(z^3 + \alpha z\right)} {\rm d}z + i \int_{0}^{z_2} \sin{\left(z^3 + \alpha z\right)} {\rm d}z - \nonumber \\
&\int_{0}^{z_1} \cos{\left(z^3 + \alpha z\right)} {\rm d}z -
i\int_{0}^{z_1} \sin{\left(z^3 + \alpha z\right)} {\rm d}z \Bigg].
\end{align}