# HG changeset patch # User Kevin Walker # Date 1279576452 21600 # Node ID deb3b17cbd1b9bb0fd897c20eb94dffff7133d14 # Parent ac607ea78942f414ef274671ff90dff7344d93b4# Parent c04bb911d63679721989db8292132d6560e0a5d2 Automated merge with https://tqft.net/hg/blob/ diff -r ac607ea78942 -r deb3b17cbd1b text/ncat.tex --- a/text/ncat.tex Mon Jul 19 14:41:05 2010 -0700 +++ b/text/ncat.tex Mon Jul 19 15:54:12 2010 -0600 @@ -1031,6 +1031,7 @@ \cl{\cC}(W) = \bigoplus_{(x_i)} \psi_{\cC;W}(x_0)[m] , \] where the sum is over all $m$-sequences $(x_i)$ and all $m$, and each summand is degree shifted by $m$. +Elements of a summand indexed by an $m$-sequences will be call $m$-simplices. We endow $\cl{\cC}(W)$ with a differential which is the sum of the differential of the $\psi_{\cC;W}(x_0)$ summands plus another term using the differential of the simplicial set of $m$-sequences. More specifically, if $(a, \bar{x})$ denotes an element in the $\bar{x}$ @@ -1045,13 +1046,12 @@ %combine only two balls at a time; for $n=1$ this version will lead to usual definition %of $A_\infty$ category} -We will call $m$ the simplex degree of the complex. We can think of this construction as starting with a disjoint copy of a complex for each -permissible decomposition (simplex degree 0). +permissible decomposition (the 0-simplices). Then we glue these together with mapping cylinders coming from gluing maps -(simplex degree 1). +(the 1-simplices). Then we kill the extra homology we just introduced with mapping -cylinders between the mapping cylinders (simplex degree 2), and so on. +cylinders between the mapping cylinders (the 2-simplices), and so on. $\cl{\cC}(W)$ is functorial with respect to homeomorphisms of $k$-manifolds. Restricting the $k$-spheres, we have now proved Lemma \ref{lem:spheres}.