#フーリエ変換の性質や諸公式 37
jω ℱ[ f(t) ]
=
jω F(jω)
=
ℱ[ (d/dt) f(t) ]
「#周波数領域 でjωをかける操作は
#時間領域 の #微分 操作と同じ」
では,jωでなく
(1/jω)をかけると…?
微分の逆で
#積分 になる!
(1/jω)ℱ[ f(t) ]
=
(1/jω) F(jω)
=
ℱ[ ∫{-∞→t} f(τ) dτ ]
0 0 1
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