離散Fourier逆変換
AM4-2023F
の定義
$ {\cal F}^{-1}_{d,N}:\N\times\Complex^\Z\ni(N,C_\bullet)\mapsto(k\mapsto\sum_{0\le n<N}C_ne^{2\pi i\frac{nk}{N}})\in\Complex^\Z
Discrete Inverse Fourier Transform
,
DIFT
#2025-06-02
12:49:23