text/deligne.tex
changeset 905 7afa2ffbbac8
parent 886 c570a7a75b07
child 906 45ffa363a8c8
equal deleted inserted replaced
904:fab3d057beeb 905:7afa2ffbbac8
   203 There is a collection of chain maps
   203 There is a collection of chain maps
   204 \[
   204 \[
   205 	C_*(SC^n_{\ol{M}\ol{N}})\otimes \hom(\bc_*(M_1), \bc_*(N_1))\otimes\cdots\otimes 
   205 	C_*(SC^n_{\ol{M}\ol{N}})\otimes \hom(\bc_*(M_1), \bc_*(N_1))\otimes\cdots\otimes 
   206 \hom(\bc_*(M_{k}), \bc_*(N_{k})) \to  \hom(\bc_*(M_0), \bc_*(N_0))
   206 \hom(\bc_*(M_{k}), \bc_*(N_{k})) \to  \hom(\bc_*(M_0), \bc_*(N_0))
   207 \]
   207 \]
   208 which satisfy the operad compatibility conditions.
   208 which satisfy the operad compatibility conditions, up to coherent homotopy.
   209 On $C_0(SC^n_{\ol{M}\ol{N}})$ this agrees with the chain map $p$ defined above.
   209 On $C_0(SC^n_{\ol{M}\ol{N}})$ this agrees with the chain map $p$ defined above.
   210 When $k=0$, this coincides with the $C_*(\Homeo(M_0\to N_0))$ action of \S\ref{sec:evaluation}.
   210 When $k=0$, this coincides with the $C_*(\Homeo(M_0\to N_0))$ action of \S\ref{sec:evaluation}.
   211 \end{thm}
   211 \end{thm}
   212 
   212 
   213 If, in analogy to Hochschild cochains, we define elements of $\hom(M, N)$
   213 If, in analogy to Hochschild cochains, we define elements of $\hom(M, N)$
   226 \hom(\bc_*(M_{k}), \bc_*(N_{k})) \to  \hom(\bc_*(M_0), \bc_*(N_0)) .
   226 \hom(\bc_*(M_{k}), \bc_*(N_{k})) \to  \hom(\bc_*(M_0), \bc_*(N_0)) .
   227 \]
   227 \]
   228 It suffices to show that the above maps are compatible with the relations whereby
   228 It suffices to show that the above maps are compatible with the relations whereby
   229 $SC^n_{\ol{M}\ol{N}}$ is constructed from the various $P$'s.
   229 $SC^n_{\ol{M}\ol{N}}$ is constructed from the various $P$'s.
   230 This in turn follows easily from the fact that
   230 This in turn follows easily from the fact that
   231 the actions of $C_*(\Homeo(\cdot\to\cdot))$ are local (compatible with gluing) and associative.
   231 the actions of $C_*(\Homeo(\cdot\to\cdot))$ are local (compatible with gluing) and associative
       
   232 (up to coherent homotopy).
   232 %\nn{should add some detail to above}
   233 %\nn{should add some detail to above}
   233 \end{proof}
   234 \end{proof}
   234 
   235 
   235 We note that even when $n=1$, the above theorem goes beyond an action of the little disks operad.
   236 We note that even when $n=1$, the above theorem goes beyond an action of the little disks operad.
   236 $M_i$ could be a disjoint union of intervals, and $N_i$ could connect the end points of the intervals
   237 $M_i$ could be a disjoint union of intervals, and $N_i$ could connect the end points of the intervals