凸函数

T

thisnot

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我应如何确定下列函数是凸?

F(下十)=- [侦探(累啊 x1A1 ... xnAn)] ^(1 /米)(x |累啊 x1A1 ... xnAn“0)〜感谢

 
我想你

<img src='http://www.elektroda.pl/cgi-bin/mimetex/mimetex.cgi?3$A_{n} (m \times m)' title="3 $(n)的钟表珠宝(米\倍米)" alt='3$A_{n} (m \times m)' align=absmiddle>使用
1。凸函数的定义

<img src='http://www.elektroda.pl/cgi-bin/mimetex/mimetex.cgi?3$f(\alpha x (1-\alpha)y)\leq \alpha f(x) (1-\alpha ) f(y)' title="3 $ F(下\阿尔法x (1 - \α)Y)的\ Leq值\阿尔法F(下十) (1 - \阿尔法)架F(Y)的" alt='3$f(\alpha x (1-\alpha)y)\leq \alpha f(x) (1-\alpha ) f(y)' align=absmiddle>
2。

<img src='http://www.elektroda.pl/cgi-bin/mimetex/mimetex.cgi?3$det(cA)=c^m det(A)' title="3 $侦探(加利福尼亚州)=秋季米侦探(甲)" alt='3$det(cA)=c^m det(A)' align=absmiddle>3。显示1。用闵可夫斯基不等式

<img src='http://www.elektroda.pl/cgi-bin/mimetex/mimetex.cgi?3$A\neq 0, B\neq 0 (m\times m)' title="3 $阿\等效采用0,乙\等效采用0(米\倍米)" alt='3$A\neq 0, B\neq 0 (m\times m)' align=absmiddle>

和正定<img src='http://www.elektroda.pl/cgi-bin/mimetex/mimetex.cgi?3$[[det(A B)]]^{\frac{1}{m}}\geq (detA)^{\frac{1}{m}} (detB)^{\frac{1}{m}}' title="3 $ [[侦探(甲 乙)]]^{ \压裂(1)(米))\固尔奇(德塔)^(\压裂(1)(米)) (detB)^(\压裂(1) (米))" alt='3$[[det(A B)]]^{\frac{1}{m}}\geq (detA)^{\frac{1}{m}} (detB)^{\frac{1}{m}}' align=absmiddle>然后,您将有<img src='http://www.elektroda.pl/cgi-bin/mimetex/mimetex.cgi?3$\alpha f(x) = -[det(\alpha A_{0} \alpha x_{1}A_{1} \cdots \alpha x_{n}A_{n})]^{\frac{1}{m}}' title="3 $ \阿尔法F(下十)= - [侦探(\阿尔法钟表珠宝(0) \阿尔法x_(1)钟表珠宝(1) \ cdots \阿尔法x_(n)的钟表珠宝(ñ })]^{ \压裂(1)(米))" alt='3$\alpha f(x) = -[det(\alpha A_{0} \alpha x_{1}A_{1} \cdots \alpha x_{n}A_{n})]^{\frac{1}{m}}' align=absmiddle>与相同

<img src='http://www.elektroda.pl/cgi-bin/mimetex/mimetex.cgi?3$(1-\alpha ) f(y)' title="3 $(1 - \阿尔法)架F(Y)的" alt='3$(1-\alpha ) f(y)' align=absmiddle>和<img src='http://www.elektroda.pl/cgi-bin/mimetex/mimetex.cgi?3$f(\alpha x (1-\alpha )y) = -[det\{ (\alpha (1-\alpha) )A_{0} (\alpha x_{1} (1-\alpha )y_{1} )A_{1} \cdots (\alpha x_{n} (1-\alpha )y_{n})A_{n} \}]^{\frac{1}{m}}' title="3 $ F(下\阿尔法x (1 - \α)y)二- [侦探\((\α (1 - \α))钟表珠宝(0) (\阿尔法x_(1) (1 - \ α)所示为(1))钟表珠宝(1) \ cdots (\阿尔法x_(n)的 (1 - \α)所示为(n)的)钟表珠宝(n)的\)] ^(\压裂(1)(米))" alt='3$f(\alpha x (1-\alpha )y) = -[det\{ (\alpha (1-\alpha) )A_{0} (\alpha x_{1} (1-\alpha )y_{1} )A_{1} \cdots (\alpha x_{n} (1-\alpha )y_{n})A_{n} \}]^{\frac{1}{m}}' align=absmiddle>
 
你是如何做这些方程后。这太神奇了!me2please说:

我想你
<img src='http://www.elektroda.pl/cgi-bin/mimetex/mimetex.cgi?3$A_{n} (m \times m)' title="3 $(n)的钟表珠宝(米\倍米)" alt='3$A_{n} (m \times m)' align=absmiddle>

使用

1。
凸函数的定义
<img src='http://www.elektroda.pl/cgi-bin/mimetex/mimetex.cgi?3$f(\alpha x (1-\alpha)y)\leq \alpha f(x) (1-\alpha ) f(y)' title="3 $ F(下\阿尔法x (1 - \α)Y)的\ Leq值\阿尔法F(下十) (1 - \阿尔法)架F(Y)的" alt='3$f(\alpha x (1-\alpha)y)\leq \alpha f(x) (1-\alpha ) f(y)' align=absmiddle>2。
<img src='http://www.elektroda.pl/cgi-bin/mimetex/mimetex.cgi?3$det(cA)=c^m det(A)' title="3 $侦探(加利福尼亚州)=秋季米侦探(甲)" alt='3$det(cA)=c^m det(A)' align=absmiddle>

3。
显示1。
用闵可夫斯基不等式
<img src='http://www.elektroda.pl/cgi-bin/mimetex/mimetex.cgi?3$A\neq 0, B\neq 0 (m\times m)' title="3 $阿\等效采用0,乙\等效采用0(米\倍米)" alt='3$A\neq 0, B\neq 0 (m\times m)' align=absmiddle> 和正定

<img src='http://www.elektroda.pl/cgi-bin/mimetex/mimetex.cgi?3$[[det(A B)]]^{\frac{1}{m}}\geq (detA)^{\frac{1}{m}} (detB)^{\frac{1}{m}}' title="3 $ [[侦探(甲 乙)]]^{ \压裂(1)(米))\固尔奇(德塔)^(\压裂(1)(米)) (detB)^(\压裂(1) (米))" alt='3$[[det(A B)]]^{\frac{1}{m}}\geq (detA)^{\frac{1}{m}} (detB)^{\frac{1}{m}}' align=absmiddle>

然后,您将有

<img src='http://www.elektroda.pl/cgi-bin/mimetex/mimetex.cgi?3$\alpha f(x) = -[det(\alpha A_{0} \alpha x_{1}A_{1} \cdots \alpha x_{n}A_{n})]^{\frac{1}{m}}' title="3 $ \阿尔法F(下十)= - [侦探(\阿尔法钟表珠宝(0) \阿尔法x_(1)钟表珠宝(1) \ cdots \阿尔法x_(n)的钟表珠宝(ñ })]^{ \压裂(1)(米))" alt='3$\alpha f(x) = -[det(\alpha A_{0} \alpha x_{1}A_{1} \cdots \alpha x_{n}A_{n})]^{\frac{1}{m}}' align=absmiddle>
与相同
<img src='http://www.elektroda.pl/cgi-bin/mimetex/mimetex.cgi?3$(1-\alpha ) f(y)' title="3 $(1 - \阿尔法)架F(Y)的" alt='3$(1-\alpha ) f(y)' align=absmiddle>



<img src='http://www.elektroda.pl/cgi-bin/mimetex/mimetex.cgi?3$f(\alpha x (1-\alpha )y) = -[det\{ (\alpha (1-\alpha) )A_{0} (\alpha x_{1} (1-\alpha )y_{1} )A_{1} \cdots (\alpha x_{n} (1-\alpha )y_{n})A_{n} \}]^{\frac{1}{m}}' title="3 $ F(下\阿尔法x (1 - \α)y)二- [侦探\((\α (1 - \α))钟表珠宝(0) (\阿尔法x_(1) (1 - \ α)所示为(1))钟表珠宝(1) \ cdots (\阿尔法x_(n)的 (1 - \α)所示为(n)的)钟表珠宝(n)的\)] ^(\压裂(1)(米))" alt='3$f(\alpha x (1-\alpha )y) = -[det\{ (\alpha (1-\alpha) )A_{0} (\alpha x_{1} (1-\alpha )y_{1} )A_{1} \cdots (\alpha x_{n} (1-\alpha )y_{n})A_{n} \}]^{\frac{1}{m}}' align=absmiddle>
 
您好firephenix405,

写帖子时
, 刚刚乳胶klick一个概述按钮。在文本上的TeX klick写下你的公式所描述的概述,再按一次德渊* -就是这样。<img src='http://www.elektroda.pl/cgi-bin/mimetex/mimetex.cgi?3$\alpha \sum \int \sqrt[n]{abc}' title="3 $ \阿尔法\总结\廉政\开方[N]个(广播)" alt='3$\alpha \sum \int \sqrt[n]{abc}' align=absmiddle>
Mik

 

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