diff -r 3e6c66df4df1 -r c9b55efd79dd text/tqftreview.tex --- a/text/tqftreview.tex Wed Jun 29 23:06:29 2011 -0700 +++ b/text/tqftreview.tex Mon Jul 04 10:25:42 2011 -0600 @@ -192,6 +192,14 @@ the gluing map is surjective. We say that fields in the image of the gluing map are transverse to $Y$ or splittable along $Y$. +\item Splittings. +Let $c\in \cC_k(X)$ and let $Y\sub X$ be a codimension 1 properly embedded submanifold of $X$. +Then for most small perturbations of $Y$ (i.e.\ for an open dense +subset of such perturbations) $c$ splits along $Y$. +(In Example \ref{ex:maps-to-a-space(fields)}, $c$ splits along all such $Y$. +In Example \ref{ex:traditional-n-categories(fields)}, $c$ splits along $Y$ so long as $Y$ +is in general position with respect to the cell decomposition +associated to $c$.) \item Product fields. There are maps $\cC_{k-1}(Y) \to \cC_k(Y \times I)$, denoted $c \mapsto c\times I$.