Anybody who does anything in the real world with Fourier transforms uses the fast Fourier transform operating on windowed data. This eliminates all of that infinite support and infinite resolution of frequencies.
To be more precise, when working with sampled data with uniform sample rate you use the Discrete Time Fourier Transform (DTFT), not the Fourier Transform!. None the less, you still end up with an approximate spectrum which is the signal spectrum convolved with the window function's spectrum.
In my view the Fourier Transform is still useful in the real world. For example you can use it to analytically derive the spectrum of a given window.
But I think the parent is hinting at wavelet basis.
If they can make this OS story go viral, then they stand to have a lot of customers defect from their competitors even people who would never really care about open source.
AirAnswers is not a startup as I originally thought, it seems to be a ten year old company with mature product and a set of patents they mention in marketing materials. If they block EU customers it's definitely a conscious choice.
Be very cautious with ozone generators. Mold might or might not damage you but ozone will definitely damage you even at very low levels that you don't notice.
There is a very prominent web site that offers a hosted version without much clarity about the fact that you can run it yourself. The hosted version offers collaborative editing similar to what Overleaf provides which is incredibly useful.
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