diff -r 0bc6fa29b62a -r 24be062a87a1 text/evmap.tex --- a/text/evmap.tex Sun Sep 19 23:15:21 2010 -0700 +++ b/text/evmap.tex Mon Sep 20 06:10:49 2010 -0700 @@ -80,7 +80,8 @@ \end{lemma} \begin{proof} -It suffices \nn{why? we should spell this out somewhere} to show that for any finitely generated pair $(C_*, D_*)$, with $D_*$ a subcomplex of $C_*$ such that +It suffices \nn{why? we should spell this out somewhere} to show that for any finitely generated +pair $(C_*, D_*)$, with $D_*$ a subcomplex of $C_*$ such that \[ (C_*, D_*) \sub (\bc_*(X), \sbc_*(X)) \] @@ -156,7 +157,8 @@ disjoint union of balls. Let $\cV_2$ be an auxiliary open cover of $X$, subordinate to $\cU$ and -also satisfying conditions specified below. \nn{This happens sufficiently far below (i.e. not in this paragraph) that we probably should give better warning.} +also satisfying conditions specified below. +\nn{This happens sufficiently far below (i.e. not in this paragraph) that we probably should give better warning.} As before, choose a sequence of collar maps $f_j$ such that each has support contained in an open set of $\cV_1$ and the composition of the corresponding collar homeomorphisms @@ -223,7 +225,8 @@ \item The gluing maps $\BD_k(M)\to \BD_k(M\sgl)$ are continuous. \item For balls $B$, the map $U(B) \to \BD_1(B)$, $u\mapsto (B, u, \emptyset)$, is continuous, where $U(B) \sub \bc_0(B)$ inherits its topology from $\bc_0(B)$ and the topology on -$\bc_0(B)$ comes from the generating set $\BD_0(B)$. \nn{don't we need to say more to specify a topology on an $\infty$-dimensional vector space} +$\bc_0(B)$ comes from the generating set $\BD_0(B)$. +\nn{don't we need to say more to specify a topology on an $\infty$-dimensional vector space} \end{itemize} We can summarize the above by saying that in the typical continuous family @@ -270,7 +273,8 @@ Note that for fixed $i$, $e$ is a chain map, i.e. $\bd_t e = e \bd_t$. A generator $y\in \btc_{0j}$ is a map $y:P\to \BD_0$, where $P$ is some $j$-dimensional polyhedron. -We define $r(y)\in \btc_{0j}$ to be the constant function $r\circ y : P\to \BD_0$. \nn{I found it pretty confusing to reuse the letter $r$ here.} +We define $r(y)\in \btc_{0j}$ to be the constant function $r\circ y : P\to \BD_0$. +\nn{I found it pretty confusing to reuse the letter $r$ here.} Let $c(r(y))\in \btc_{0,j+1}$ be the constant map from the cone of $P$ to $\BD_0$ taking the same value (namely $r(y(p))$, for any $p\in P$). Let $e(y - r(y)) \in \btc_{1j}$ denote the $j$-parameter family of 1-blob diagrams @@ -302,7 +306,10 @@ &= x - r(x) + r(x) \\ &= x. \end{align*} -Here we have used the fact that $\bd_b(c(r(x))) = 0$ since $c(r(x))$ is a $0$-blob diagram, as well as that $\bd_t(e(r(x))) = e(r(\bd_t x))$ \nn{explain why this is true?} and $c(r(\bd_t x)) - \bd_t(c(r(x))) = r(x)$ \nn{explain?}. +Here we have used the fact that $\bd_b(c(r(x))) = 0$ since $c(r(x))$ is a $0$-blob diagram, +as well as that $\bd_t(e(r(x))) = e(r(\bd_t x))$ +\nn{explain why this is true?} +and $c(r(\bd_t x)) - \bd_t(c(r(x))) = r(x)$ \nn{explain?}. For $x\in \btc_{00}$ we have \begin{align*} @@ -517,10 +524,12 @@ \end{equation*} \end{enumerate} 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. +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. +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} @@ -712,8 +721,8 @@ We have $\deg(p'') = 0$ and, inductively, $f'' = p''(b'')$. %We also have that $\deg(b'') = 0 = \deg(p'')$. Choose $x' \in \bc_*(p(V))$ such that $\bd x' = f'$. -This is possible by Properties \ref{property:disjoint-union} and \ref{property:contractibility} and the fact that isotopic fields -differ by a local relation. +This is possible by Properties \ref{property:disjoint-union} and \ref{property:contractibility} +and the fact that isotopic fields differ by a local relation. Finally, define \[ e(p\ot b) \deq x' \bullet p''(b'') . @@ -829,7 +838,8 @@ \begin{proof} -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 $u < \lambda$ . +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