inverse fourier transform iDFT ifft 4 methods in open office + something extra
http://www.mediafire.com/file/hyz4dbski4w00pb/inverse+fourier+transform+iDFT+ifft+4+methods+in+open+office+++something+extra.ods
http://www.mediafire.com/file/59bpnci966ulec9/DFT+FFT+RADIX-2+DIT+algorytm+Transformacja+Fouriera+analitycznie+v3.4.xlsx
