複素数の定義 // Complex definition const z0 = math.complex(1, 2); console.log(z0); // Pr {re: 1, im: 2} console.log(z0.toString()); // 1 + 2i FFT // FFT sample const f = []; const N = 4; for(let i = 0; i < N; i += 1) { f.push(i); } console…