Source Code: media/img/tex/lobsterblog_xml.12.tex

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\begin{document}

\large

\begin{align*}
  \text{ let } \omega &= \frac{f}{\text{Hz}}
  \text{ where } 0 \le f \le \frac{\text{Hz}}{2} \\
  G(n) &= \begin{cases}
    0                                              & \text{ if } n < 0 \\
    S_{n} + 2\cos(2\pi\omega)G(n-1) - G(n-2) & \text{ if } n \ge 0
  \end{cases} \\
  P &= G(k - 2)^{2} + G(k - 1)^{2} - 2\cos(2\pi\omega) G(k - 2)G(k - 1)
\end{align*}
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