Fourier Transform of $|f|$
41946
Find the Fourier transform of the absolute value of a function, given its Fourier transform
135967
What is the odd Fourier extension of $\sin x \cos(2x)$?
28221
Numerical Fourier transform of a complicated function
87119
A positive "Fourier transform" is integrable
93312
Fourier transform of the indicator of the unit ball
37546
Fourier Series for $|\cos(x)|$
5167
Finding the limit that involves Fourier coefficients,
69913
Inverse Fourier transform of Gaussian
34542
If $f$ is integrable then $|f|$ is also integrable
106477
Fourier Series of "Split" Defined Function
3387
Derivative of $f(x)=|x|$
153271
Fourier transform is uniformly continuous
114982
How do I get that $|\int_a^b f| \le \int_a^b |f|$?
745
$F(x)$ versus $F[x]$ where $F$ is a field
137289
Applying Fourier transform to a gaussian
91257
Fourier basis functions
26687
Show that $f$ maps the unit circle to itself