[複變] 一題證明
原題目為
Is |∫ f(z) dz | = ∫|f(z)| dz ?
c c
小弟自己覺得應該是
|∫ f(z) dz | ≦ ∫|f(z)| dz
c c
雖然看的懂但不知道怎麼證明它 = =
有沒有除了畫圖以外的方法可以證明QQ
感恩
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