# HG changeset patch # User Scott Morrison # Date 1275200000 25200 # Node ID 2252c53bd4490fc36e96f0fe3c857b15d390220c # Parent 52309e058a9537a2789d0e3d43cc540d04b9a73b minor changes in a few places diff -r 52309e058a95 -r 2252c53bd449 text/a_inf_blob.tex --- a/text/a_inf_blob.tex Sat May 29 23:13:03 2010 -0700 +++ b/text/a_inf_blob.tex Sat May 29 23:13:20 2010 -0700 @@ -279,8 +279,14 @@ To simplify notation, let $\cT = \pi^\infty_{\leq n}(T)$. \begin{thm} \label{thm:map-recon} -$\cB^\cT(M) \simeq C_*(\Maps(M\to T))$. +The blob complex for $M$ with coefficients in the fundamental $A_\infty$ $n$-category for $T$ is quasi-isomorphic to singular chains on maps from $M$ to $T$. +$$\cB^\cT(M) \simeq C_*(\Maps(M\to T)).$$ \end{thm} +\begin{rem} +\nn{This just isn't true, Lurie doesn't do this! I just heard this from Ricardo...} +Lurie has shown in \cite{0911.0018} that the topological chiral homology of an $n$-manifold $M$ with coefficients in \nn{a certain $E_n$ algebra constructed from $T$} recovers the same space of singular chains on maps from $M$ to $T$, with the additional hypothesis that $T$ is $n-1$-connected. This extra hypothesis is not surprising, in view of the idea that an $E_n$ algebra is roughly equivalent data as an $A_\infty$ $n$-category which is trivial at all but the topmost level. +\end{rem} + \begin{proof} We begin by constructing chain map $g: \cB^\cT(M) \to C_*(\Maps(M\to T))$. We then use \ref{extension_lemma_b} to show that $g$ induces isomorphisms on homology. diff -r 52309e058a95 -r 2252c53bd449 text/evmap.tex --- a/text/evmap.tex Sat May 29 23:13:03 2010 -0700 +++ b/text/evmap.tex Sat May 29 23:13:20 2010 -0700 @@ -41,7 +41,8 @@ I lean toward the latter.} \medskip -The proof will occupy the the next several pages. +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. + Without loss of generality, we will assume $X = Y$. \medskip @@ -108,7 +109,7 @@ where $r(b_W)$ denotes the obvious action of homeomorphisms on blob diagrams (in this case a 0-blob diagram). Since $V'$ is a disjoint union of balls, $\bc_*(V')$ is acyclic in degrees $>0$ -(by \ref{disjunion} and \ref{bcontract}). +(by Properties \ref{property:disjoint-union} and \ref{property:contractibility}). Assuming inductively that we have already defined $e_{VV'}(\bd(q\otimes b_V))$, there is, up to (iterated) homotopy, a unique choice for $e_{VV'}(q\otimes b_V)$ such that @@ -153,8 +154,7 @@ \medskip -Now for the details. - +\begin{proof}[Proof of Proposition \ref{CHprop}.] Notation: Let $|b| = \supp(b)$, $|p| = \supp(p)$. Choose a metric on $X$. @@ -313,7 +313,7 @@ $G_*^{i,m}$. Choose a monotone decreasing sequence of real numbers $\gamma_j$ converging to zero. Let $\cU_j$ denote the open cover of $X$ by balls of radius $\gamma_j$. -Let $h_j: CH_*(X)\to CH_*(X)$ be a chain map homotopic to the identity whose image is spanned by families of homeomorphisms with support compatible with $\cU_j$, as described in Lemma \ref{xxxxx}. +Let $h_j: CH_*(X)\to CH_*(X)$ be a chain map homotopic to the identity whose image is spanned by families of homeomorphisms with support compatible with $\cU_j$, as described in Lemma \ref{extension_lemma}. Recall that $h_j$ and also the homotopy connecting it to the identity do not increase supports. Define @@ -610,26 +610,10 @@ \end{itemize} -\nn{to be continued....} - -\noop{ - -\begin{lemma} - -\end{lemma} - -\begin{proof} - \end{proof} -} +\nn{to be continued....} -%\nn{say something about associativity here} - - - - - diff -r 52309e058a95 -r 2252c53bd449 text/ncat.tex --- a/text/ncat.tex Sat May 29 23:13:03 2010 -0700 +++ b/text/ncat.tex Sat May 29 23:13:20 2010 -0700 @@ -86,6 +86,7 @@ Morphisms are modeled on balls, so their boundaries are modeled on spheres: \begin{axiom}[Boundaries (spheres)] +\label{axiom:spheres} For each $0 \le k \le n-1$, we have a functor $\cC_k$ from the category of $k$-spheres and homeomorphisms to the category of sets and bijections. @@ -735,7 +736,7 @@ (actions of homeomorphisms); define $k$-cat $\cC(\cdot\times W)$} -Recall that Axiom \ref{} for an $n$-category provided functors $\cC$ from $k$-spheres to sets for $0 \leq k < n$. We claim now that these functors automatically agree with the colimits we have associated to spheres in this section. \todo{} \todo{In fact, we probably should do this for balls as well!} For the remainder of this section we will write $\underrightarrow{\cC}(W)$ for the colimit associated to an arbitary manifold $W$, to distinguish it, in the case that $W$ is a ball or a sphere, from $\cC(W)$, which is part of the definition of the $n$-category. After the next three lemmas, there will be no further need for this notational distinction. +Recall that Axiom \ref{axiom:spheres} for an $n$-category provided functors $\cC$ from $k$-spheres to sets for $0 \leq k < n$. We claim now that these functors automatically agree with the colimits we have associated to spheres in this section. \todo{} \todo{In fact, we probably should do this for balls as well!} For the remainder of this section we will write $\underrightarrow{\cC}(W)$ for the colimit associated to an arbitary manifold $W$, to distinguish it, in the case that $W$ is a ball or a sphere, from $\cC(W)$, which is part of the definition of the $n$-category. After the next three lemmas, there will be no further need for this notational distinction. \begin{lem} For a $k$-ball or $k$-sphere $W$, with $0\leq k < n$, $$\underrightarrow{\cC}(W) = \cC(W).$$