diff -r 73cb0346f53c -r d2409e357801 text/ncat.tex --- a/text/ncat.tex Fri Jul 24 22:33:31 2009 +0000 +++ b/text/ncat.tex Tue Jul 28 00:33:08 2009 +0000 @@ -551,6 +551,20 @@ \nn{give figure for this, or say more?} Then $\cE$ has the structure of an $n{-}1$-category. +All marked $k$-balls are homeomorphic, unless $k = 1$ and our manifolds +are oriented or Spin (but not unoriented or $\text{Pin}_\pm$). +In this case ($k=1$ and oriented or Spin), there are two types +of marked 1-balls, call them left-marked and right-marked, +and hence there are two types of modules, call them right modules and left modules. +In all other cases ($k>1$ or unoriented or $\text{Pin}_\pm$), +there is no left/right module distinction. + +\medskip + +Next we consider tensor products (or, more generally, self tensor products +or coends). + + \medskip \hrule @@ -564,15 +578,16 @@ a separate paper): \begin{itemize} \item tensor products -\item blob complex is an example of an $A_\infty$ $n$-category -\item fundamental $n$-groupoid is an example of an $A_\infty$ $n$-category \item traditional $n$-cat defs (e.g. *-1-cat, pivotal 2-cat) imply our def of plain $n$-cat \item conversely, our def implies other defs +\item do same for modules; maybe an appendix on relating topological +vs traditional defs, $n = 1,2$, $A_\infty$ or not, cats, modules, tensor products \item traditional $A_\infty$ 1-cat def implies our def \item ... and vice-versa (already done in appendix) \item say something about unoriented vs oriented vs spin vs pin for $n=1$ (and $n=2$?) \item spell out what difference (if any) Top vs PL vs Smooth makes \item explain relation between old-fashioned blob homology and new-fangled blob homology +\item define $n{+}1$-cat of $n$-cats; discuss Morita equivalence \end{itemize}