# HG changeset patch # User Scott Morrison # Date 1301606038 25200 # Node ID da7ac7d30f306c5742836cac1dc8fe8946ce2b24 # Parent db9d3a27647a77fa18cf2f573bb29cdde6dfefb1# Parent 59c29ecf2f66d4a37ebd44483c5314d2a4b52671 Automated merge with https://tqft.net/hg/blob diff -r db9d3a27647a -r da7ac7d30f30 text/appendixes/comparing_defs.tex --- a/text/appendixes/comparing_defs.tex Wed Mar 30 08:03:27 2011 -0700 +++ b/text/appendixes/comparing_defs.tex Thu Mar 31 14:13:58 2011 -0700 @@ -48,12 +48,12 @@ The base case is for oriented manifolds, where we obtain no extra algebraic data. For 1-categories based on unoriented manifolds, -there is a map $*:c(\cX)^1\to c(\cX)^1$ +there is a map $\dagger:c(\cX)^1\to c(\cX)^1$ coming from $\cX$ applied to an orientation-reversing homeomorphism (unique up to isotopy) from $B^1$ to itself. Topological properties of this homeomorphism imply that -$a^{**} = a$ (* is order 2), * reverses domain and range, and $(ab)^* = b^*a^*$ -(* is an anti-automorphism). +$a^{\dagger\dagger} = a$ ($\dagger$ is order 2), $\dagger$ reverses domain and range, and $(ab)^\dagger = b^\dagger a^\dagger$ +($\dagger$ is an anti-automorphism). For 1-categories based on Spin manifolds, the the nontrivial spin homeomorphism from $B^1$ to itself which covers the identity diff -r db9d3a27647a -r da7ac7d30f30 text/ncat.tex --- a/text/ncat.tex Wed Mar 30 08:03:27 2011 -0700 +++ b/text/ncat.tex Thu Mar 31 14:13:58 2011 -0700 @@ -37,7 +37,7 @@ Strictly speaking, before we can state the axioms for $k$-morphisms we need all the axioms for $k{-}1$-morphisms. -So readers who prefer things to be presented in a strictly logical order should read this subsection $n$ times, first imagining that $k=0$, then that $k=1$, and so on until they reach $k=n$. +Readers who prefer things to be presented in a strictly logical order should read this subsection $n+1$ times, first setting $k=0$, then $k=1$, and so on until they reach $k=n$. \medskip @@ -834,6 +834,9 @@ The case $n=d$ captures the $n$-categorical nature of bordisms. The case $n > 2d$ captures the full symmetric monoidal $n$-category structure. \end{example} +\begin{remark} +Working with the smooth bordism category would require careful attention to either collars, corners or halos. +\end{remark} %\nn{the next example might be an unnecessary distraction. consider deleting it.}