Math Is Fun Forum

Candide

Member

Registered: 2010-09-30

Posts: 3

Evaluating a sum

Hey,

I have been working on this problem for quite a while, but can't find a solution:

I'm looking for a solution of P. I'd appreciate any hints or suggestions!

Last edited by Candide (2010-09-30 10:06:26)

Bob

Administrator

Registered: 2010-06-20

Posts: 10,631

Re: Evaluating a sum

Hi Candide

I need to know more.  What part do x, beta and M play in this?  Is it OK to regard them as constants?

Bob

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

George,Y

Member

Registered: 2006-03-12

Posts: 1,379

Re: Evaluating a sum

It looks like a problem of Radon-Nikodym Derivative.

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X'(y-Xβ)=0

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Evaluating a sum

Hi George,Y;

I was looking at that when discussing Martingales. I do not see the similarity. To me it is definitely a probability problem nothing more. That does not make the sum any more tractable unless you are handy with the snake oil method.

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.