There is, by the way, a brief introduction to the FFT used in MPIR (the same FFT is used in Flint), here [1].
[1] https://github.com/wbhart/flint2/blob/trunk/fft/README On 25 April 2018 at 10:18, Bill Hart <goodwillh...@googlemail.com> wrote: > Hi, > > We don't use quite this FFT in MPIR. The best reference on the FFT that I > know of is by Joerg Arndt. > > https://www.jjj.de/fxt/fxtbook.pdf > > It doesn't cover the FFT we use, but it gives you the basic ideas that are > necessary to understand it. > > Bill. > > On 25 April 2018 at 03:51, Tanushree Banerjee <banerjee.tanushree10@gmail. > com> wrote: > >> I was going through the documentation of MPIR ( >> http://mpir.org/mpir-3.0.0.pdf), specially section 16.1.5 where they >> refer to the use of Fermat's style FFT. I tried to follow the reference but >> couldn't quite understand this technique, can anyone explain to me how this >> Fermat's FFT work? I don't understand how and why the modulus changes from >> (2^N+1) to (2M+k+3) using FFT-k splitting? If there is some documentation >> on this with better explanation it would be very helpful! Thanks a lot for >> your patience >> >> -- >> You received this message because you are subscribed to the Google Groups >> "mpir-devel" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to mpir-devel+unsubscr...@googlegroups.com. >> To post to this group, send email to mpir-devel@googlegroups.com. >> Visit this group at https://groups.google.com/group/mpir-devel. >> For more options, visit https://groups.google.com/d/optout. >> > > -- You received this message because you are subscribed to the Google Groups "mpir-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to mpir-devel+unsubscr...@googlegroups.com. To post to this group, send email to mpir-devel@googlegroups.com. Visit this group at https://groups.google.com/group/mpir-devel. For more options, visit https://groups.google.com/d/optout.
