[請益] 凹性與凸性
若Hessian為N.D(負定) , 則表示此為convex or concave?
若Hessian為P.D(正定) , 則表示此為convex or concave?
一個函數為convex or concave 可用Hessian來判斷嗎? Why?
找不到相關的說明
謝謝指教!!
補問一個問題...
為什麼convex = concave function?
而 concave= convex function?
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◆ From: 59.121.3.213
※ 編輯: aaasdf 來自: 59.121.3.213 (10/16 20:20)
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10/16 22:37, , 1F
10/16 22:37, 1F
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10/16 22:59, , 2F
10/16 22:59, 2F
※ 編輯: aaasdf 來自: 59.121.3.213 (10/17 22:56)
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10/17 22:56, , 3F
10/17 22:56, 3F
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10/17 22:59, , 4F
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10/17 23:00, , 5F
10/17 23:00, 5F
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10/17 23:01, , 6F
10/17 23:01, 6F
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10/18 01:32, , 7F
10/18 01:32, 7F
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10/18 23:49, , 8F
10/18 23:49, 8F
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10/18 23:52, , 9F
10/18 23:52, 9F
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10/18 23:53, , 10F
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10/18 23:54, , 11F
10/18 23:54, 11F
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10/18 23:56, , 12F
10/18 23:56, 12F