pnas/pnas.tex
changeset 621 e448415ad80a
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   759 \bc_*(X\bigcup_Y \selfarrow) \simeq \bc_*(X) \Tensor^{A_\infty}_{\mathclap{\bc_*(Y)}} \selfarrow
   759 \bc_*(X\bigcup_Y \selfarrow) \simeq \bc_*(X) \Tensor^{A_\infty}_{\mathclap{\bc_*(Y)}} \selfarrow
   760 \end{equation*}
   760 \end{equation*}
   761 \end{itemize}
   761 \end{itemize}
   762 \end{thm}
   762 \end{thm}
   763 
   763 
       
   764 \begin{proof} (Sketch.)
       
   765 The $A_\infty$ action of $\bc_*(Y)$ follows from the naturality of the blob complex with respect to gluing
       
   766 and the $C_*(\Homeo(-))$ action of Theorem \ref{thm:evaluation}.
       
   767 
       
   768 Let $T_*$ denote the self tensor product of $\bc_*(X)$, which is a homotopy colimit.
       
   769 Let $X_{\mathrm gl}$ denote $X$ glued to itself along $Y$.
       
   770 There is a tautological map from the 0-simplices of $T_*$ to $\bc_*(X_{\mathrm gl})$,
       
   771 and this map can be extended to a chain map on all of $T_*$ by sending the higher simplices to zero.
       
   772 Constructing a homotopy inverse to this natural map invloves making various choices, but one can show that the
       
   773 choices form contractible subcomplexes and apply the acyclic models theorem.
       
   774 \end{proof}
   764 
   775 
   765 We next describe the blob complex for product manifolds, in terms of the $A_\infty$ blob complex of the $A_\infty$ $n$-categories constructed as above.
   776 We next describe the blob complex for product manifolds, in terms of the $A_\infty$ blob complex of the $A_\infty$ $n$-categories constructed as above.
   766 
   777 
   767 \begin{thm}[Product formula]
   778 \begin{thm}[Product formula]
   768 \label{thm:product}
   779 \label{thm:product}
   775 \]
   786 \]
   776 \end{thm}
   787 \end{thm}
   777 The statement can be generalized to arbitrary fibre bundles, and indeed to arbitrary maps
   788 The statement can be generalized to arbitrary fibre bundles, and indeed to arbitrary maps
   778 (see \cite[\S7.1]{1009.5025}).
   789 (see \cite[\S7.1]{1009.5025}).
   779 
   790 
   780 \nn{Theorem \ref{thm:product} is proved in \S \ref{ss:product-formula}, and Theorem \ref{thm:gluing} in \S \ref{sec:gluing}.}
   791 \begin{proof} (Sketch.)
       
   792 
       
   793 \end{proof}
       
   794 
       
   795 %\nn{Theorem \ref{thm:product} is proved in \S \ref{ss:product-formula}, and Theorem \ref{thm:gluing} in \S \ref{sec:gluing}.}
   781 
   796 
   782 \section{Higher Deligne conjecture}
   797 \section{Higher Deligne conjecture}
   783 \label{sec:applications}
   798 \label{sec:applications}
   784 
   799 
   785 \begin{thm}[Higher dimensional Deligne conjecture]
   800 \begin{thm}[Higher dimensional Deligne conjecture]