Image:Waldhausen cat.png

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Created using xy-pic: \begin{xy}\xymatrix{A \ar@{>->}[r]^cof \ar[d] & B \ar[d] \\ C \ar@{>->}[r]^cof & B\cup_A C}\end{xy}

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Date/TimeDimensionsUserComment
current21:21, 24 October 2007188×115 (3 KB)Ben Tillman (Talk | contribs) (Created using xy-pic: \begin{xy}\xymatrix{A \ar@{>->}[r]^cof \ar[d] & B \ar[d] \\ C \ar@{>->}[r]^cof & B\cup_A C}\end{xy})

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