<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">\xymatrix @=9pt {
	A(X') \ar[rr] \ar[dd] \ar[dr] &amp;&amp; A(\Delta[n]) \arfib'[d][dd] \arwe[dr] &amp; \\
	&amp;	C^\ast(X') \ar[rr] \ar[dd] &amp;&amp; C^\ast(\Delta[n]) \arfib[dd] \\
	A(X) \ar'[r][rr] \arwe[dr] &amp;&amp; A(\del\Delta[n]) \arwe[dr] &amp; \\
	&amp;	C^\ast(X) \ar[rr] &amp;&amp; C^\ast(\del\Delta[n])
}</pre></body></html>