[Xy-pic] xymatrix and matrix

[Aleks Kleyn]

I want combine diagram of mappings with some notes in one equations. The
code

\[

\begin{matrix}

\xymatrix

{

\ShowSymbol{affine space, division ring}:

D\ar[r]|{*}^{f_{1,2}}&

\Vector V\ar[r]|{*}^{f_{2,3}}&

\Vcirc

}

&

\begin{array}{r@{\,}l}

f_{1,2}(d):&\Vector v\rightarrow d\ \Vector v

\\

f_{2,3}(\Vector v):&A\rightarrow A+\Vector v

\end{array}

\end{matrix}

\]

 

creates very good image. However code

\[

\begin{matrix}

\xymatrix

{

D\ar[r]|(.4){*}^{f_{1,2}}&

A\ar[r]|{*}^{f_{2,3}}&

A

\\

&&D\ar[u]|{*}_{f_{1,2}}

}

&

\begin{array}{r@{\,}l}

f_{1,2}(d):&v\rightarrow d\,v

\\

f_{2,3}(v):&w\rightarrow g(v, w)

\\

g&\in\mathcal L(A^2;A)

\end{array}

\end{matrix}

\]

 

has extra line before diagram. The picture looks little shifted. I will
appreciate any idea to improve image.

Aleks Kleyn

 <http://sites.google.com/site/alekskleyn/>
http://sites.google.com/site/AleksKleyn/ 

 <http://arxiv.org/a/kleyn_a_1> http://arxiv.org/a/kleyn_a_1  

 <http://AleksKleyn.blogspot.com/> http://AleksKleyn.blogspot.com/

 

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