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Results tagged with fourier-analysis
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user 8857
The representation of functions (or objects which are in some generalize the notion of function) as constant linear combinations of sines and cosines at integer multiples of a given frequency, as Fourier transforms or as Fourier integrals.
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votes
Quick computation of the Pontryagin dual group of torus
You can "almost" prove that rather abstractly.
The dual group (this is a group because the torus is abelian) is discrete.
Moreover, because the torus is connected, the dual group is torsion-free.
Henc …