Code: Select all
\begin{displaymath}
\xymatrix{
&&&&\prod_{RESP, BUDGET}\\
&&&&\cup\ar[u]\\
&\sigma_{PNO}\ar[urrr]&\sigma_{PNO}\ar[urr]&\sigma_{PNO}\ar[ur]&\sigma_{PNO}\ar[u]&\sigma_{PNO}\ar[ul]&\sigma_{PNO}\ar[ull]&\\
PROJ1\ar[ur]&ASG1\ar[u]&PROJ1\ar[ur]&ASG1\ar[u]&PROJ1\ar[ur]&ASG1\ar[u]&PROJ1\ar[ur]&ASG1\ar[u]\\
}
\end{displaymath}