diff -r 43fa3a30d89c -r e88e44347b36 text/evmap.tex --- a/text/evmap.tex Mon Jul 19 08:21:06 2010 -0700 +++ b/text/evmap.tex Mon Jul 19 08:42:24 2010 -0700 @@ -36,9 +36,13 @@ } \end{equation*} \end{enumerate} -Up to (iterated) homotopy, there is a unique family $\{e_{XY}\}$ of chain maps -satisfying the above two conditions. +Moreover, for any $m \geq 0$, we can find a family of chain maps $\{e_{XY}\}$ +satisfying the above two conditions which is $m$-connected. In particular, this means that the choice of chain map above is unique up to homotopy. \end{thm} +\begin{rem} +Note that the statement doesn't quite give uniqueness up to iterated homotopy. We fully expect that this should actually be the case, but haven't been able to prove this. +\end{rem} + Before giving the proof, we state the essential technical tool of Lemma \ref{extension_lemma}, and then give an outline of the method of proof. @@ -345,7 +349,7 @@ \begin{proof} -There exists $\lambda > 0$ such that for every subset $c$ of the blobs of $b$ $\Nbd_u(c)$ is homeomorphic to $|c|$ for all $u < \lambda$ . +There exists $\lambda > 0$ such that for every subset $c$ of the blobs of $b$ the set $\Nbd_u(c)$ is homeomorphic to $|c|$ for all $u < \lambda$ . (Here we are using the fact that the blobs are piecewise smooth or piecewise-linear and that $\bd c$ is collared.) We need to consider all such $c$ because all generators appearing in @@ -582,9 +586,6 @@ these two maps agree up to $m$-th order homotopy. More precisely, one can show that the subcomplex of maps containing the various $e_{m+1}$ candidates is contained in the corresponding subcomplex for $e_m$. -\nn{now should remark that we have not, in fact, produced a contractible set of maps, -but we have come very close} -\nn{better: change statement of thm} \medskip