diff -r daa522adb488 -r 84bb5ab4c85c text/ncat.tex --- a/text/ncat.tex Fri Aug 05 12:27:11 2011 -0600 +++ b/text/ncat.tex Tue Aug 09 19:28:39 2011 -0600 @@ -945,8 +945,13 @@ Another variant of the above axiom would be to drop the ``up to homotopy" and require a strictly associative action. In fact, the alternative construction $\btc_*(X)$ of the blob complex described in \S \ref{ss:alt-def} -gives $n$-categories as in Example \ref{ex:blob-complexes-of-balls} which satisfy this stronger axiom; -since that construction is only homotopy equivalent to the usual one, only the weaker axiom carries across. +gives $n$-categories as in Example \ref{ex:blob-complexes-of-balls} which satisfy this stronger axiom. +%since that construction is only homotopy equivalent to the usual one, only the weaker axiom carries across. +For future reference we make the following definition. + +\begin{defn} +A {\em strict $A_\infty$ $n$-category} is one in which the actions of Axiom \ref{axiom:families} are strictly associative. +\end{defn} \noop{ Note that if we take homology of chain complexes, we turn an $A_\infty$ $n$-category @@ -1220,7 +1225,7 @@ Let $A$ be an $\cE\cB_n$-algebra. Note that this implies a $\Diff(B^n)$ action on $A$, since $\cE\cB_n$ contains a copy of $\Diff(B^n)$. -We will define an $A_\infty$ $n$-category $\cC^A$. +We will define a strict $A_\infty$ $n$-category $\cC^A$. If $X$ is a ball of dimension $k