diff -r 3df8116f1f0a -r 57425531f564 text/ncat.tex --- a/text/ncat.tex Sat Jun 25 06:27:16 2011 -0700 +++ b/text/ncat.tex Sat Jun 25 06:44:35 2011 -0700 @@ -34,10 +34,11 @@ The axioms for an $n$-category are spread throughout this section. Collecting these together, an $n$-category is a gadget satisfying Axioms \ref{axiom:morphisms}, -\ref{nca-boundary}, \ref{axiom:composition}, \ref{nca-assoc}, \ref{axiom:product} and -\ref{axiom:extended-isotopies}; for an $A_\infty$ $n$-category, we replace +\ref{nca-boundary}, \ref{axiom:composition}, \ref{nca-assoc}, \ref{axiom:product}, \ref{axiom:vcones} and +\ref{axiom:extended-isotopies}. +For an enriched $n$-category we add \ref{axiom:enriched}. +For an $A_\infty$ $n$-category, we replace Axiom \ref{axiom:extended-isotopies} with Axiom \ref{axiom:families}. -\nn{need to revise this after we're done rearranging the a-inf and enriched stuff} Strictly speaking, before we can state the axioms for $k$-morphisms we need all the axioms for $k{-}1$-morphisms. @@ -984,14 +985,16 @@ In the $n$-category axioms above we have intermingled data and properties for expository reasons. Here's a summary of the definition which segregates the data from the properties. -An $n$-category consists of the following data: \nn{need to revise this list} +An $n$-category consists of the following data: \begin{itemize} \item functors $\cC_k$ from $k$-balls to sets, $0\le k\le n$ (Axiom \ref{axiom:morphisms}); \item boundary natural transformations $\cC_k \to \cl{\cC}_{k-1} \circ \bd$ (Axiom \ref{nca-boundary}); \item ``composition'' or ``gluing'' maps $\gl_Y : \cC(B_1)\trans E \times_{\cC(Y)} \cC(B_2)\trans E \to \cC(B_1\cup_Y B_2)\trans E$ (Axiom \ref{axiom:composition}); \item ``product'' or ``identity'' maps $\pi^*:\cC(X)\to \cC(E)$ for each pinched product $\pi:E\to X$ (Axiom \ref{axiom:product}); -\item if enriching in an auxiliary category, additional structure on $\cC_n(X; c)$; -\item in the $A_\infty$ case, an action of $C_*(\Homeo_\bd(X))$, and similarly for families of collar maps (Axiom \ref{axiom:families}). +\item if enriching in an auxiliary category, additional structure on $\cC_n(X; c)$ (Axiom \ref{axiom:enriched}); +%\item in the $A_\infty$ case, an action of $C_*(\Homeo_\bd(X))$, and similarly for families of collar maps (Axiom \ref{axiom:families}). +\item in the $A_\infty$ case, actions of the topological spaces of homeomorphisms preserving boundary conditions +and collar maps (Axiom \ref{axiom:families}). \end{itemize} The above data must satisfy the following conditions: \begin{itemize} @@ -1001,8 +1004,10 @@ \item The gluing maps are strictly associative (Axiom \ref{nca-assoc}). \item The product maps are associative and also compatible with homeomorphism actions, gluing and restriction (Axiom \ref{axiom:product}). \item If enriching in an auxiliary category, all of the data should be compatible -with the auxiliary category structure on $\cC_n(X; c)$. -\item For ordinary categories, invariance of $n$-morphisms under extended isotopies (Axiom \ref{axiom:extended-isotopies}). +with the auxiliary category structure on $\cC_n(X; c)$ (Axiom \ref{axiom:enriched}). +\item The possible splittings of a morphism satisfy various conditions (Axiom \ref{axiom:vcones}). +\item For ordinary categories, invariance of $n$-morphisms under extended isotopies +and collar maps (Axiom \ref{axiom:extended-isotopies}). \end{itemize}