ightarrow\quad  1\\
     ?\quad& \Longleftrightarrow \quad e^{i  \omega t_o}\\
     ?\quad &\Longleftrightarrow \quad  \cos( \omega t_o)\\
     ? \quad & \Longleftrightarrow \quad \int_{-\infty}^{\infty} F(\nu) G(\omega-\nu) d\nu
\end{align}`

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#The Reverse Reflections

These reverse reflection equations are:
`\begin{align}
  L g(tL)\quad &\Longleftrightarrow\quad  G(\omega/L)\\
   e^{i\omega_o t } g(t) &\Longleftrightarrow\quad  G(\omega-\omega_o)
     \\
 -i