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494 More could be said about finite characteristic |
494 More could be said about finite characteristic |
495 (there appears in be $2$-torsion in $\bc_1(S^2; \cC)$ for any spherical $2$-category $\cC$, for example). |
495 (there appears in be $2$-torsion in $\bc_1(S^2; \cC)$ for any spherical $2$-category $\cC$, for example). |
496 Much more could be said about other types of manifolds, in particular oriented, |
496 Much more could be said about other types of manifolds, in particular oriented, |
497 $\operatorname{Spin}$ and $\operatorname{Pin}^{\pm}$ manifolds, where boundary issues become more complicated. |
497 $\operatorname{Spin}$ and $\operatorname{Pin}^{\pm}$ manifolds, where boundary issues become more complicated. |
498 (We'd recommend thinking about boundaries as germs, rather than just codimension $1$ manifolds.) |
498 (We'd recommend thinking about boundaries as germs, rather than just codimension $1$ manifolds.) |
499 We've also take the path of least resistance by considering $\operatorname{PL}$ manifolds; |
499 We've also take the path of least resistance by concentrating on PL manifolds; |
500 there may be some differences for topological manifolds and smooth manifolds. |
500 there may be some differences for topological manifolds and smooth manifolds. |
501 |
501 |
502 The paper ``Skein homology'' \cite{MR1624157} has similar motivations, and it may be |
502 The paper ``Skein homology'' \cite{MR1624157} has similar motivations, and it may be |
503 interesting to investigate if there is a connection with the material here. |
503 interesting to investigate if there is a connection with the material here. |
504 |
504 |