j
k
j a
j l
so exp(-2 * pi * i * k * n / N)
......np.exp(-2 * np.pi * 1j) (1+2.4492935982947064e-16j) np.exp(2 * np.pi * 1j) (1-2.4492935982947064e-16j)
...np.exp(-2 * np.pi * 1j) (1+2.4492935982947064e-16j) np.exp(2 * np.pi * 1j) (1-2.4492935982947064e-16j)
np.exp(-2 * np.pi * 1j) (1+2.4492935982947064e-16j) np.exp(2 * np.pi * 1j) (1-2.4492935982947064e-16j)
it looks like the real component is the cosine of the coefficient and the imaginary component is the sine
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