--- a/build.xml Wed Jun 02 22:46:31 2010 -0700
+++ b/build.xml Thu Jun 03 09:47:18 2010 -0700
@@ -92,7 +92,7 @@
</exec>
</target>
- <target name="scott-copy-pdf" depends="direct-pdf">
+ <target name="copy-pdf" depends="direct-pdf">
<copy file="blob1.pdf" tofile="../../Sites/tqft.net/papers/blobs.pdf"/>
<exec executable="svn" dir="../../Sites/tqft.net/papers/">
<arg value="commit"/>
--- a/text/ncat.tex Wed Jun 02 22:46:31 2010 -0700
+++ b/text/ncat.tex Thu Jun 03 09:47:18 2010 -0700
@@ -1343,17 +1343,17 @@
\label{ssec:spherecat}
In this subsection we define an $n{+}1$-category $\cS$ of ``sphere modules"
-whose objects correspond to $n$-categories.
+whose objects are $n$-categories.
When $n=2$
-this is a version of the familiar algebras-bimodules-intertwiners 2-category.
-(Terminology: It is clearly appropriate to call an $S^0$ module a bimodule,
+this is a version of the familiar algebras-bimodules-intertwiners $2$-category.
+While it is clearly appropriate to call an $S^0$ module a bimodule,
but this is much less true for higher dimensional spheres,
-so we prefer the term ``sphere module" for the general case.)
+so we prefer the term ``sphere module" for the general case.
The $0$- through $n$-dimensional parts of $\cC$ are various sorts of modules, and we describe
these first.
The $n{+}1$-dimensional part of $\cS$ consists of intertwiners
-(of garden-variety $1$-category modules associated to decorated $n$-balls).
+of (garden-variety) $1$-category modules associated to decorated $n$-balls.
We will see below that in order for these $n{+}1$-morphisms to satisfy all of
the duality requirements of an $n{+}1$-category, we will have to assume
that our $n$-categories and modules have non-degenerate inner products.
@@ -1367,10 +1367,10 @@
(This, in turn, is very similar to our definition of $n$-category.)
Because of this similarity, we only sketch the definitions below.
-We start with 0-sphere modules, which also could reasonably be called (categorified) bimodules.
+We start with $0$-sphere modules, which also could reasonably be called (categorified) bimodules.
(For $n=1$ they are precisely bimodules in the usual, uncategorified sense.)
-Define a 0-marked $k$-ball $(X, M)$, $1\le k \le n$, to be a pair homeomorphic to the standard
-$(B^k, B^{k-1})$, where $B^{k-1}$ is properly embedded in $B^k$.
+Define a $0$-marked $k$-ball $(X, M)$, $1\le k \le n$, to be a pair homeomorphic to the standard
+$(B^k, B^{k-1})$.
See Figure \ref{feb21a}.
Another way to say this is that $(X, M)$ is homeomorphic to $B^{k-1}\times([-1,1], \{0\})$.
@@ -1382,20 +1382,20 @@
\label{feb21a}
\end{figure}
-0-marked balls can be cut into smaller balls in various ways.
-These smaller balls could be 0-marked or plain.
-We can also take the boundary of a 0-marked ball, which is 0-marked sphere.
+The $0$-marked balls can be cut into smaller balls in various ways. We only consider those decompositions in which the smaller balls are either
+ $0$-marked (i.e. intersect the $0$-marking of the large ball in a disc) or plain (don't intersect the $0$-marking of the large ball).
+We can also take the boundary of a $0$-marked ball, which is $0$-marked sphere.
Fix $n$-categories $\cA$ and $\cB$.
-These will label the two halves of a 0-marked $k$-ball.
-The 0-sphere module we define next will depend on $\cA$ and $\cB$
+These will label the two halves of a $0$-marked $k$-ball.
+The $0$-sphere module we define next will depend on $\cA$ and $\cB$
(it's an $\cA$-$\cB$ bimodule), but we will suppress that from the notation.
-An $n$-category 0-sphere module $\cM$ is a collection of functors $\cM_k$ from the category
-of 0-marked $k$-balls, $1\le k \le n$,
+An $n$-category $0$-sphere module $\cM$ is a collection of functors $\cM_k$ from the category
+of $0$-marked $k$-balls, $1\le k \le n$,
(with the two halves labeled by $\cA$ and $\cB$) to the category of sets.
If $k=n$ these sets should be enriched to the extent $\cA$ and $\cB$ are.
-Given a decomposition of a 0-marked $k$-ball $X$ into smaller balls $X_i$, we have
+Given a decomposition of a $0$-marked $k$-ball $X$ into smaller balls $X_i$, we have
morphism sets $\cA_k(X_i)$ (if $X_i$ lies on the $\cA$-labeled side)
or $\cB_k(X_i)$ (if $X_i$ lies on the $\cB$-labeled side)
or $\cM_k(X_i)$ (if $X_i$ intersects the marking and is therefore a smaller 0-marked ball).
@@ -1404,7 +1404,7 @@
\medskip
-Part of the structure of an $n$-category 0-sphere module is captured by saying it is
+Part of the structure of an $n$-category 0-sphere module $\cM$ is captured by saying it is
a collection $\cD^{ab}$ of $n{-}1$-categories, indexed by pairs $(a, b)$ of objects (0-morphisms)
of $\cA$ and $\cB$.
Let $J$ be some standard 0-marked 1-ball (i.e.\ an interval with a marked point in its interior).
@@ -1413,7 +1413,7 @@
\cD(X) \deq \cM(X\times J) .
\]
The product is pinched over the boundary of $J$.
-$\cD$ breaks into ``blocks" according to the restrictions to the pinched points of $X\times J$
+The set $\cD$ breaks into ``blocks" according to the restrictions to the pinched points of $X\times J$
(see Figure \ref{feb21b}).
These restrictions are 0-morphisms $(a, b)$ of $\cA$ and $\cB$.
@@ -1429,9 +1429,9 @@
of these points labeled by $n$-categories $\cA_i$ ($0\le i\le l$) and the marked points labeled
by $\cA_i$-$\cA_{i+1}$ bimodules $\cM_i$.
(See Figure \ref{feb21c}.)
-To this data we can apply to coend construction as in Subsection \ref{moddecss} above
-to obtain an $\cA_0$-$\cA_l$ bimodule and, forgetfully, an $n{-}1$-category.
-This amounts to a definition of taking tensor products of bimodules over $n$-categories.
+To this data we can apply the coend construction as in Subsection \ref{moddecss} above
+to obtain an $\cA_0$-$\cA_l$ $0$-sphere module and, forgetfully, an $n{-}1$-category.
+This amounts to a definition of taking tensor products of $0$-sphere module over $n$-categories.
\begin{figure}[!ht]
\begin{equation*}
@@ -1445,7 +1445,7 @@
associated to the marked and labeled circle.
(See Figure \ref{feb21c}.)
If the circle is divided into two intervals, we can think of this $n{-}1$-category
-as the 2-ended tensor product of the two bimodules associated to the two intervals.
+as the 2-sided tensor product of the two bimodules associated to the two intervals.
\medskip
@@ -1558,18 +1558,4 @@
\item functors
\end{itemize}
-\bigskip
-\hrule
-\nn{Some salvaged paragraphs that we might want to work back in:}
-\bigskip
-
-Appendix \ref{sec:comparing-A-infty} explains the translation between this definition of an $A_\infty$ $1$-category and the usual one expressed in terms of `associativity up to higher homotopy', as in \cite{MR1854636}. (In this version of the paper, that appendix is incomplete, however.)
-
-The motivating example is `chains of maps to $M$' for some fixed target space $M$. This is a topological $A_\infty$ category $\Xi_M$ with $\Xi_M(J) = C_*(\Maps(J \to M))$. The gluing maps $\Xi_M(J) \tensor \Xi_M(J') \to \Xi_M(J \cup J')$ takes the product of singular chains, then glues maps to $M$ together; the associativity condition is automatically satisfied. The evaluation map $\ev_{J,J'} : \CD{J \to J'} \tensor \Xi_M(J) \to \Xi_M(J')$ is the composition
-\begin{align*}
-\CD{J \to J'} \tensor C_*(\Maps(J \to M)) & \to C_*(\Diff(J \to J') \times \Maps(J \to M)) \\ & \to C_*(\Maps(J' \to M)),
-\end{align*}
-where the first map is the product of singular chains, and the second is precomposition by the inverse of a diffeomorphism.
-
-\hrule
--- a/text/tqftreview.tex Wed Jun 02 22:46:31 2010 -0700
+++ b/text/tqftreview.tex Thu Jun 03 09:47:18 2010 -0700
@@ -32,7 +32,7 @@
\begin{example}
\label{ex:maps-to-a-space(fields)}
Fix a target space $T$, and let $\cC(X)$ be the set of continuous maps
-from X to $B$.
+from $X$ to $T$.
\end{example}
\begin{example}
@@ -184,11 +184,11 @@
\subsection{Systems of fields from $n$-categories}
\label{sec:example:traditional-n-categories(fields)}
-We now describe in more detail systems of fields coming from sub-cell-complexes labeled
+We now describe in more detail Example \ref{ex:traditional-n-categories(fields)}, systems of fields coming from sub-cell-complexes labeled
by $n$-category morphisms.
Given an $n$-category $C$ with the right sort of duality
-(e.g. pivotal 2-category, 1-category with duals, star 1-category, disklike $n$-category),
+(e.g. a pivotal 2-category, 1-category with duals, star 1-category, disklike $n$-category),
we can construct a system of fields as follows.
Roughly speaking, $\cC(X)$ will the set of all embedded cell complexes in $X$
with codimension $i$ cells labeled by $i$-morphisms of $C$.
@@ -196,9 +196,7 @@
If $X$ has boundary, we require that the cell decompositions are in general
position with respect to the boundary --- the boundary intersects each cell
-transversely, so cells meeting the boundary are mere half-cells.
-
-Put another way, the cell decompositions we consider are dual to standard cell
+transversely, so cells meeting the boundary are mere half-cells. Put another way, the cell decompositions we consider are dual to standard cell
decompositions of $X$.
We will always assume that our $n$-categories have linear $n$-morphisms.
@@ -207,7 +205,7 @@
an object (0-morphism) of the 1-category $C$.
A field on a 1-manifold $S$ consists of
\begin{itemize}
- \item A cell decomposition of $S$ (equivalently, a finite collection
+ \item a cell decomposition of $S$ (equivalently, a finite collection
of points in the interior of $S$);
\item a labeling of each 1-cell (and each half 1-cell adjacent to $\bd S$)
by an object (0-morphism) of $C$;
@@ -233,7 +231,7 @@
A field of a 1-manifold is defined as in the $n=1$ case, using the 0- and 1-morphisms of $C$.
A field on a 2-manifold $Y$ consists of
\begin{itemize}
- \item A cell decomposition of $Y$ (equivalently, a graph embedded in $Y$ such
+ \item a cell decomposition of $Y$ (equivalently, a graph embedded in $Y$ such
that each component of the complement is homeomorphic to a disk);
\item a labeling of each 2-cell (and each partial 2-cell adjacent to $\bd Y$)
by a 0-morphism of $C$;