Cyclotomic polynomial: Difference between revisions
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lg=. >.&.(2&^.) lgl >. lgd NB. required lengths of all polynomials for fft transforms
NB. really, "divisor" is the fft of the divisor!
divisor=. */ fftw"1 lg{."1 ctlist NB. FFT article doesn't deal with lists of multiplicands
unpad roundreal ifftw"1 divisor %~ fftw lg{.dividend NB. similar to article's multiplication
end.
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