replace in opening quotations

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2022-04-12 23:17:03 -03:00
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@@ -71,7 +71,7 @@ Properties of Fourier transforms</A>
<P>
In this section we will investigate what happens when we take the Fourier
transform of a (complex) sinusoid. The simplest one is ``DC", the special
transform of a (complex) sinusoid. The simplest one is "DC", the special
sinusoid of frequency zero. After we derive the Fourier transform of that, we
will develop some properties of Fourier transforms that allow us to apply the
result to any other sinusoid.