diff -r 9bb7d314c694 -r 9b8b474e272c text/a_inf_blob.tex --- a/text/a_inf_blob.tex Fri May 28 13:06:58 2010 -0700 +++ b/text/a_inf_blob.tex Fri May 28 15:20:11 2010 -0700 @@ -21,16 +21,20 @@ \subsection{A product formula} -Let $M^n = Y^k\times F^{n-k}$. -Let $C$ be a plain $n$-category. -Let $\cF$ be the $A_\infty$ $k$-category which assigns to a $k$-ball -$X$ the old-fashioned blob complex $\bc_*(X\times F)$. - \begin{thm} \label{product_thm} -The old-fashioned blob complex $\bc_*^C(Y\times F)$ is homotopy equivalent to the -new-fangled blob complex $\bc_*^\cF(Y)$. +Given a topological $n$-category $C$ and a $n-k$-manifold $F$, recall from Example \ref{ex:blob-complexes-of-balls} that there is an $A_\infty$ $k$-category $C^{\times F}$ defined by +\begin{equation*} +C^{\times F}(B) = \cB_*(B \times F, C). +\end{equation*} +Now, given a $k$-manifold $Y$, there is a homotopy equivalence between the `old-fashioned' blob complex for $Y \times F$ with coefficients in $C$ and the `new-fangled' (i.e. homotopy colimit) blob complex for $Y$ with coefficients in $C^{\times F}$: +\begin{align*} +\cB_*(Y \times F, C) & \htpy \cB_*(Y, C^{\times F}) +\end{align*} \end{thm} +\begin{question} +Is it possible to compute the blob homology of a non-trivial bundle in terms of the blob homology of its fiber? +\end{question} \begin{proof}[Proof of Theorem \ref{product_thm}] @@ -342,7 +346,7 @@ \end{proof} \nn{maybe should also mention version where we enrich over -spaces rather than chain complexes; should comment on Lurie's (and others') similar result +spaces rather than chain complexes; should comment on Lurie's \cite{0911.0018} (and others') similar result for the $E_\infty$ case, and mention that our version does not require any connectivity assumptions}