# HG changeset patch # User kevin@6e1638ff-ae45-0410-89bd-df963105f760 # Date 1264620888 0 # Node ID 8f884d8c8d4906a246638ec5c52c73124032bfbd # Parent a2ff2d278b97e3f91ad871c5819046342927e5a2 ... diff -r a2ff2d278b97 -r 8f884d8c8d49 text/ncat.tex --- a/text/ncat.tex Wed Jan 27 18:33:59 2010 +0000 +++ b/text/ncat.tex Wed Jan 27 19:34:48 2010 +0000 @@ -827,7 +827,7 @@ First, we can compose two module morphisms to get another module morphism. -\xxpar{Module composition:} +\mmpar{Module axiom 6}{Module composition} {Let $M = M_1 \cup_Y M_2$, where $M$, $M_1$ and $M_2$ are marked $k$-balls ($0\le k\le n$) and $Y = M_1\cap M_2$ is a marked $k{-}1$-ball. Let $E = \bd Y$, which is a marked $k{-}2$-hemisphere. @@ -849,7 +849,7 @@ module morphism. We'll call this the action map to distinguish it from the other kind of composition. -\xxpar{$n$-category action:} +\mmpar{Module axiom 7}{$n$-category action} {Let $M = X \cup_Y M'$, where $M$ and $M'$ are marked $k$-balls ($0\le k\le n$), $X$ is a plain $k$-ball, and $Y = X\cap M'$ is a $k{-}1$-ball. @@ -865,7 +865,7 @@ If $k < n$ we require that $\gl_Y$ is injective. (For $k=n$, see below.)} -\xxpar{Module strict associativity:} +\mmpar{Module axiom 8}{Strict associativity} {The composition and action maps above are strictly associative.} Note that the above associativity axiom applies to mixtures of module composition, @@ -903,9 +903,9 @@ (The above operad-like structure is analogous to the swiss cheese operad \cite{MR1718089}.) -\nn{need to double-check that this is true.} +%\nn{need to double-check that this is true.} -\xxpar{Module product (identity) morphisms:} +\mmpar{Module axiom 9}{Product/identity morphisms} {Let $M$ be a marked $k$-ball and $D$ be a plain $m$-ball, with $k+m \le n$. Then we have a map $\cM(M)\to \cM(M\times D)$, usually denoted $a\mapsto a\times D$ for $a\in \cM(M)$. If $f:M\to M'$ and $\tilde{f}:M\times D \to M'\times D'$ are maps such that the diagram @@ -917,13 +917,13 @@ \nn{Need to add compatibility with various things, as in the n-cat version of this axiom above.} -\nn{** marker --- resume revising here **} +\nn{postpone finalizing the above axiom until the n-cat version is finalized} There are two alternatives for the next axiom, according whether we are defining modules for plain $n$-categories or $A_\infty$ $n$-categories. In the plain case we require -\xxpar{Extended isotopy invariance in dimension $n$:} +\mmpar{Module axiom 10a}{Extended isotopy invariance in dimension $n$} {Let $M$ be a marked $n$-ball and $f: M\to M$ be a homeomorphism which restricts to the identity on $\bd M$ and is extended isotopic (rel boundary) to the identity. Then $f$ acts trivially on $\cM(M)$.} @@ -936,7 +936,7 @@ For $A_\infty$ modules we require -\xxpar{Families of homeomorphisms act.} +\mmpar{Module axiom 10b}{Families of homeomorphisms act} {For each marked $n$-ball $M$ and each $c\in \cM(\bd M)$ we have a map of chain complexes \[ C_*(\Homeo_\bd(M))\ot \cM(M; c) \to \cM(M; c) . @@ -956,7 +956,9 @@ More specifically, let $J$ be a marked 1-ball, and define $\cE(X)\deq \cM(X\times J)$, where $X$ is a $k$-ball or $k{-}1$-sphere and in the product $X\times J$ we pinch above the non-marked boundary component of $J$. -\nn{give figure for this, or say more?} +(More specifically, we collapse $X\times P$ to a single point, where +$P$ is the non-marked boundary component of $J$.) +\nn{give figure for this?} Then $\cE$ has the structure of an $n{-}1$-category. All marked $k$-balls are homeomorphic, unless $k = 1$ and our manifolds