\fmtversion

$$\commdiag{Y&\mapright^f&E\cr \mapdown&\arrow(3,2)\lft{f_t&\mapdown\cr Y\times I&\mapright^{\bar f_t&X$$

\end

From DYMACEK@fs.sciences.WLU.EDU Fri Apr 15 09:21:12 1994 To: kb@cs.umb.edu From: "Wayne M. Dymacek" <DYMACEK@fs.sciences.WLU.EDU> Date: Fri, 15 Apr 1994 9:19:15 EDT

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