556.txt

This complete matlab for neural network

发信人: helloboy (hello), 信区: DataMining
标  题: Re: 对偶性问题
发信站: 南京大学小百合站 (Tue Oct 29 08:39:12 2002), 站内信件

thx.
0 -> MAX(最大的正数）
+ -> min

So
a+b -> min (a,b)
a+0 -> min( a, MAX) =a

这些在影射后都是对的。
So I want to ask
a - b -> ?(a,b)

同样
a - 0 =a -> ?(a,MAX)=a

我就是说?其实可以取min运算。
但是原来代数里面的-号是非对称的。a-b <> b-a
但 - ->min的话，
a - b -> min(a, b)=min(b,a)


【 在 fervvac (高远) 的大作中提到: 】
: 1. It is not dual, it is homo??? (TONG GOU) in algebra
: 2. You can refer to (advanced) algebra for a more theoretic desc treatment of 
: the topic.  You will see everything is  integrated ni ely
: in that theory!
: 3. I am not sure what is your 0, but for any b != 0, your a+b <> 0.
: That is, there is no reverse element for your +. Thats not conforming to
: the requirement of a field, where each non-zero element has a reverse 
: element such that a + (-a) = 0
: 【 在 helloboy (hello) 的大作中提到: 】
: : 可以啊。你说是什么运算啊？


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