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From Ted Dunning <ted.dunn...@gmail.com>
Subject Re: Singular vectors of a recommendation Item-Item space
Date Thu, 01 Sep 2011 03:57:51 GMT
Hmm... I see this:

http://latex.codecogs.com/gif.latex?F(x,y)=0%20~~\mbox{and}~~%20\left|%20\begin{array}{ccc}%20F''_{xx}%20&%20F''_{xy}%20&%20F'_x%20\\%20F''_{yx}%20&%20F''_{yy}%20&%20F'_y%20\\%20F'_x%20&%20F'_y%20&%200%20\end{array}\right|%20=%200

Must be a cut and paste kind of thing.

On Wed, Aug 31, 2011 at 10:50 PM, Ken Krugler
<kkrugler_lists@transpac.com>wrote:

> > F(x,y)=0 ~~\mbox{and}~~
> > \left| \begin{array}{ccc}
> >  F''_{xx} & F''_{xy} &  F'_x \\
> >  F''_{yx} & F''_{yy} &  F'_y \\
> >  F'_x     & F'_y     & 0
> >  \end{array}\
> > right| = 0
>
> The codecogs.com site says that it's an invalid equation.

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