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Mathematics
Quick fact
The FFT algorithm reduces the number of operations from roughly N² (for a DFT) to N log₂ N. For a signal with 1,024 samples, that means about 10,000 operations instead of 1,000,000—a 100x speedup.
Why this is interesting
You use the Fast Fourier Transform every time you listen to music, speak on a phone, or look at a JPEG image—yet this mathematical trick is so efficient it was once considered a national secret.
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Subjects · study & training · careers
Choose something you are considering. FACTREE will give you a clear picture of what it contains, how its main parts connect and where it could lead.
This private catalogue connects 31 subjects, study routes and careers across six broad areas. Public Maps and learner routes remain off.
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See what programming involves, how its main areas connect, and whether you find the knowledge interesting enough to take it further.
Structuring the Programming Map…
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Administrator
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