added remark to easy gluing prop (compatible with gluing on fields). this is in response to comment from PT that the zero map satisfies the claims of the proposition.
--- a/text/basic_properties.tex Tue Feb 08 13:15:46 2011 -0800
+++ b/text/basic_properties.tex Wed Feb 09 18:21:58 2011 -0800
@@ -113,6 +113,7 @@
The sum is over all fields $a$ on $Y$ compatible at their
($n{-}2$-dimensional) boundaries with $c$.
``Natural" means natural with respect to the actions of diffeomorphisms.
+In degree zero the map agrees with the gluing map coming from the underlying system of fields.
\end{prop}
This map is very far from being an isomorphism, even on homology.